Reaction Essays
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Owensboro Community and Technical College *
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MISC
Subject
Chemistry
Date
Nov 24, 2024
Type
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40
Uploaded by CommodoreBatPerson997
Komal Patel
Chemistry Honors
Period: 5
February 29, 2016
Chemical Reaction Lab Report
Introduction
A chemical reaction is when substances (reactants) change into other substances (products). The five
general types of chemical reactions are synthesis (also known as direct combination),
decomposition, single replacement (also known as single displacement), double replacement (also
known as double displacement), and combustion. In this lab, the five general types of
chemical
reactions
were conducted and observations were taken before, during, and after the reaction. Then
the reactants and observations were used to determine the products to form a balanced chemical
equation. The purpose of this lab was to learn and answer the question: How can observations be
used to determine the identity of substances produced in a
chemical reaction
?
Results
Chemical Reactions Conducted in the Lab (#1)
Station:
Type of Reaction:
Balanced Chemical Equation:
1
Synthesis Mg
2Mg(s) + O2(g) MgO(aq)
1
Synthesis Mg and water
MgO(aq) + H2O(l) Mg(OH)2(aq)
2
Decomposition
NaHCO3
2NaHCO3(s) CO2(g) + H2O(l) + NaCO3(s)
3
Decomposition H2O2
2H202(aq) 2H2O(l) + O2(g)
4
Single Replacement
Cu
2AgNO3(aq) + 2Cu(s) 2Ag(s) + Cu(NO3)2(aq)
5
Single Replacement
Zn
Zn(s) + 2HCl(aq) H2(g) + ZnCl2(aq)
6
Double
Replacement
Na2CO3
Na2CO3(aq) + Ca(NO3)2(aq) CaCO3(s) + 2NaNO3(aq)
6
Double
Replacement
NaOH
2NaOH(aq) + CuSO4(aq) Cu(OH)2(s) + Na2SO4(aq)
Combustion
Methane Gas
CH4(g) + 2O2(g) CO2(g) +
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Rates of Reaction Essay example
Investigating the rate of reaction between sodium thiosulphate and hydrochloric acid
I am going to measure the rate of the reaction when hydrochloric acid is added to sodium
thiosulphate. I am going to investigate what effect the concentration of the sodium thiosulphate has
on the reaction rate.
When
sodium thiosulphate
and hydrochloric acid are mixed, a yellow precipitate of sulphur is
produced. The solution becomes increasingly difficult to see through as more and more sulphur is
formed. This is how I plan to measure the rate of the reaction. I will place a laminated cross
underneath the solution and will stop the stop clock when the cross can no longer be seen.
I aim to conduct a fair and safe investigation to determine what
affects
...show more content...
This is
collision theory
. The two molecules will only react if they have enough energy. This is
known as activation energy. Increasing the concentration of the reactants will increase the frequency
of collisions between the two reactants. The following diagram illustrates this theory with the
reaction between magnesium and hydrochloric acid, whereas we are using sodium thiosulphate
instead of magnesium, but the theory is clearer if we use a solid as one of the reactants. However,
when collisions occur, they do not always result in a reaction. Only if the two colliding molecules
have sufficient energy will they react. This is the kinetic theory. It is normally applied to
temperature, i.e., increasing temperature means the molecules move faster, but it is also relevant
here.
So, we can deduce from this that the temperature will also affect the experiment and therefore must
remain constant.
It is also relevant to note the following: –
For a
chemical reaction
to take place, some bonds in the reactants must be broken. The colliding
particles must have enough energy to break these bonds. This minimum amount of energy is called
the activation energy, as mentioned previously. Only the very fastest moving particles have enough
energy to break bonds.
In gases, liquids and in a solution, the particles move at a range of speeds. Some are moving very
slowly and others are
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Chemical Reaction : Chemical Reactions
Background Information: A chemical reaction is the change of a substance into a new one that has a
different chemical identity (Chemical Reaction , 2015). It rearranges the atoms of the reactants to
create different chemical elements or compounds. Chemical reactions occur because an atom is
trying to get a full outer shell of electrons. A
chemical reaction
is usually accompanied by easily
observable physical effects such as the emission of heat and light, precipitate, gas and colour change
(Factors that affect reaction rates, 2015). When a chemical reaction is complete there will be
stability, no further charge and no energy being released or absorbed. The rate of a chemical reaction
is the speed at which the reaction occurs. Some reactions are essentially instantaneous while other
may take decades. The factors that influence that the rates of chemical reactions include the
temperature, the solvent, surface area and the presence of a catalyst (Factors that affect reaction
rates, 2015) . Temperature increases the average kinetic energy making it move faster and collide
more frequently, increasing the
reaction rate
(Reaction Rates, 2015). Solvent viscosity is the density
and thickness of the solution. The more viscous the fluid, the more dense it will be and so it will
take longer to diffuse causing the reaction time to be slower (Factors that affect reaction rates,
2015). The surface area is increased by grinding or cutting the substance into smaller pieces. If the
surface
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Reaction Paper on Accounting
Chapter 7 Reflection Paper
Financial Accounting
Buildings, machinery, equipment, furniture, fixtures, computers, cars and trucks are examples of
assets that will last for more than one year, but will not last indefinitely. These are some examples of
long–lived non–monetary assets. When these assets were acquired, the company has made an
expenditure. If the company will benefit in the curret period, the cost of the goods are expenses. If
the benefits are expected in future periods, the costs are assets during the current period and the
expenditures are capitalized. The cost of these non–monetary assets should be matched with the
revenues that are obtained from its use in the future periods.
In general there are two types of long–lived
...show more content...
Under any
depreciation
method, the maximum depreciation during the life of an
asset
is limited to
the cost of the asset. The difference in depreciation methods involves when you will report the
depreciation. It's a matter of timing.
When property, plant, and equipment are disposed of, their dollar amounts must be removed from
the accounts and any other assets received must be recorded. One reason knowledge of the effects of
disposals of property, plant, and equipment are important to managers is that such disposals can
result in useful resources. Another reason is that such disposals can affect the company's net income.
When considering disposing of property, plant, and equipment, managers must consider whether the
advantages of obtaining usable resources are enough to offset the possible negative income effects.
It is also possible to increase resources through the disposal of property, plant, and equipment. In
such cases, resources and sources of resources increase. The increases in sources of resources are
called gains and appear on the income statement as part of other revenues and expenses.
Some properties and equipments are disposed by trading them in or exchanging them for new assets.
If the trade in is similar, its value is assumed to be the net book value. If the asset traded is
dissimilar, its value is its estimated fair value.
Wasting assets refer to natural resources such as coal, oil or gas.
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Chemical Reaction : Chemical Reactions
Chemical Reactions
A chemical reaction is a "chemical change that occur when chemical bonds between atoms are
formed or broken." The substance that goes into a chemical reaction is the reactant, and the
substances produced produced at the end of the reaction are known as products. Chemical reactions
are all around us constantly occurring, anything from a candle burning to the rusting on a fence are
examples of a
chemical reaction
. Chemical reactions can be noticed by Chemical Change some
example of chemical change are change in temperature, change in color, bubbles, precipitate, light,
and odor.
Chemical reactions such as combustion or fire, fermentation and the reduction of ores to
create
...show more content...
Compounds are formed by combination of atoms in simple ratios to give compound atoms." The
theory was the basis of modern
chemistry
Dalton's theory provided a basis for understanding the
results of earlier experimentalists, including the The Law for Conservation of Matter and the Law of
Constant Composition, which stated all samples of a substance have identical elemental
compositions. These theory's and experiments defined the concept of chemical reactions.
Thousands of known chemical reactions occur in living things, in industrial processes and in
laboratories. To more easily predict the outcome of chemical reactions a basic system of
classification was put in place for chemical reactions. The system categorized the reactions into five
different groups Synthesis, Decomposition, Single–Replacement Reaction, Double–Replacement,
and Combustion reactions.
When scientists are creating new compounds from other substances, chemists say they are
synthesizing a new material. A synthesis reaction is a reaction where two or more elements or
compounds combine to from one compound. This reaction type fallows this general form A + B =
AB
Where A and B can be either compounds or elements. For example 2Na + Cl = 2NaCl
These reactions are
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Essay On Reaction Time
Statistics direct investigation
Introduction
The aim of this investigation Is to determine if there is a difference in reaction time between males
and females, if so which sex has the fastest average reaction time. To determine which sex has the
fastest average reaction time, a sample group of seven males and seven females will be used. This
group will take an online visual reaction test. This data will be graphed into histograms (a graph to
visually represent the reaction time for each
sex
) and box and whisker plots, the mean and medium
of this data will also be found. The group with the lowest five number summary will be found to
have the fastest reaction time. The five–number summary contains five statistical values the
minimum value,
...show more content...
From this sample size, these results indicate that males have a faster average reaction time as four
values of the five–point summary have been found to be faster in males. The range for the
female
values are 0.09 seconds (difference between the maximum and minimum values), whilst the range
for males are 0.082 seconds.
These graphs (figure 1.3 and figure 1.4) depicts a greater spread of data in the female reaction time
compared to the
male
. These figures also depict all male's reaction times begin under the 0.3–second
mark compared to the females with two values above the 0.3 mark.
Analysis
The results suggest that the average male reaction time is faster than females, which is indicated by
the males having a faster mean and lower values from the five–point summary. The range of the data
points for both males and females are similar. It was also found that males have more consistent
reaction times (with each other) (figure 1.4), four males have the same range. Compared to females
in which the highest shared value range was two people (figure 1.3). However, this may be a
coincidence and could not be proven until the sample size of the practical is increased. The values
utilized for both males and females were found to have no outliers (Calculate upper boundary =
Quartile 3 + 1.5 x Interquartile range any values above this are considered an outliers) (Calculate
lower boundary = Quartile 3 – 1.5 x interquartile range any
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Equilibrium And The Chemical Reaction
Introduction:
Equilibrium, in a chemical reaction, is the state in which the concentrations of both the reactants and
products remain constant. This phenomenon occurs because of the rates of both the forward and
reverse reactions are equal. The concept of equilibrium is extremely important in our daily lives as it
assists the industrial production of ammonia, the understanding of the acid dissociation constant
(acid/base equilibria) and so on and so forth. In this lab, we will examine an equilibrium reaction, a
solubility
curve and the
thermodynamics
associated with equilibrium concepts in a simple manner.
The dissolution reaction we will be examining in this experiment is shown below.
KNO3(s) + H2O(l) –>–< K+(aq) + NO3−(aq)
As water with calculated amounts of potassium nitrate (KNO3) is heated to certain
temperature
, the
KNO3 will fully dissolve. When the solution is cooled down to a specific temperature, KNO3 will
recrystallize and that temperature is recorded. The solubility (mol/L) of the compound will be
measured for six or seven temperatures over a range of 40°C–60°C as more volume of water is
added to solution. With the collected data, several thermodynamic variables (ΔH, ΔS and ΔG) will
be calculated.
In this experiment, we will make two simplifying assumptions in the calculations:
#1. The activities of the ions and the ionic strength of the solutions are not considered. #2. The
temperature at which the crystals become visible is probably lower then
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The Reaction Of An Enzyme Essay
An enzyme is a macromolecule that acts as a catalyst, a chemical agent that speeds up a reaction
without being consumed by the reaction (Coleman 2016). With different pHs and temperatures the
enzyme's rate of reaction can drastically alter. For example, peroxidase, a type of enzyme that is
found in various plant tissues, was used to look into the reactions of Guaiacol + H2O2 –>
Tetraguaiacol +2H2O mixed into test tubes. Following the extract of the
enzyme
the process of
standardization was taking place in order to determine the amount of extract of peroxidase to use.
Then data about the production of tetraguaiacol absorbance were recorded into a scatter plot and
tables. Factors that were recorded in 15 second increments were the amount of extract, pH values,
and boiling rate of reactions altered. The 0.5 mL had a lower change of reaction rate than the control
while the 2.0 mL also had a lower rate of reaction. Then for boiling it seems that it hit a point of
denaturation, because of the slope reached positive at first, then it had a negative slope, which lead
to the process of breaking down hydrogen bonds. Containing the data about the three factors used
for peroxidase is important, for results may alter or would not occur, due to the lack of optimal
conditions met (Barron 2014).
Introduction
Metabolism
is the totality of an organism's
chemical reaction
, which contains catabolic and anabolic
pathways (Coleman, 2016). It is important to an organism for it allows growth,
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Transfusion Reaction Essay
Transfusion Reactions
A transfusion reaction is the body's systemic response to the administration of blood. Causes for
transfusion reactions can include red cell incompatibility; allergic response due to leukocytes,
platelets, plasma protein components of transfused blood, or the anticoagulant (potassium or citrate
preservatives) used to store the
blood
, just to name a few. Symptoms, prevention, and treatment will
be discussed for the following transfusion reactions: Transfusion Associated Circulatory Overload
(TACO), Transfusion–Related Acute Long Injury (TRALI), Hemolytic Transfusion Reactions,
Anaphylaxis and Allergic Transfusion Reactions, and Febrile Transfusion Reactions.
Transfusion–Associated Circulatory Overload (TACO) is a reaction that can happen during or
shortly after the completion of the transfusion. It is a frequent and often serious. TACO is causes
pulmonary edema which mimic's congestive heart failure. This is due rapidly infusing a large
volume transfusion to a patient who is not able to handle the expanded blood volume. Some
symptoms of TACO include headache, shortness of breath, and systolic hypertension. In order to
prevent this from happening, transfusions to susceptible patients must be carefully administered and
monitored. If a patient is at risk for volume overload, only a small amount of the transfused product
should be transfused. For treatment, the excess volume must be removed, clinically, by diuresis.
Transfusion–Related Acute Lung Injury
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Chemical Reactions Essay
Chemical Reactions
Chemical reactions are the heart of chemistry. People have always known that they exist.
The Ancient Greeks were the firsts to speculate on the composition of matter. They thought that it
was possible that individual particles made up matter.
Later, in the
Seventeenth Century
, a German chemist named Georg Ernst Stahl was the first to
postulate on
chemical
reaction, specifically, combustion. He said that a substance called phlogiston
escaped into the air from all substances during combustion.
He explained that a burning candle would go out if a candle snuffer was put over it because the air
inside the snuffer became saturated with phlogiston. According to his ideas, wood is made up of
phlogiston and ash,
...show more content...
There are now many classification systems to classify the different types of
reactions
. These include
decomposition, polymerization, chain reactions, substitute reactions, elimination reactions, addition
reactions, ionic reactions, and oxidation–reduction reactions.
Decomposition reactions are reactions in which a substance breaks into smaller parts. As an
example, ammonium carbonate will decompose into ammonia, carbon dioxide, and water.
Polymerization reactions are reactions in which simpler substances combine to form a complex
substance. The thing that makes this reaction unusual is that the final product is composed of
hundreds of the simpler reagent (a substance that contributes to a chemical reaction) species. One
example is the polymerization of terephthalic acid with ethylene glycol to form the polymer called
Dacron, a fibre, or Mylar, in sheet form:
nH2OC(C6H4)CO2H + nHOCH2CH2OH –> [...OC(C6H4)CO2CH2CH2O...]n 2nH2O
in which n is a large number of moles. A chain reaction is a series of smaller reactions in which the
previous reaction forms a reagent for the next reaction. The synthesis of hydrogen bromide is a good
example:
H2 + Br2 –> 2HBr
This is a simple equation that doesn't properly prove the reaction. It is very complex and starts with
this:
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Br2 –> 2Br
The next three reactions are related and should be grouped together. A substation reaction is a
reaction in which a substance loses one or more atoms and
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Reaction Paper On Existentialism
The world we live in is an odd one; some cope with its absurdities through intensive faith, others
through utter disregard of all its meaning. Existentialism, however, leads us down a peculiar path
that blurs these concepts into one unique belief system. While we might be faced with situations
beyond our complete control, we do have the power to control how we handle said situations and
whether or not we choose to cultivate significance from them. The search for significance is very
primitive and so are the answers that have accompanied it throughout human history. Obviously, life
doesn't have a clearly stated purpose to it; it is up to each individual to create their own relative
purpose and find their own happiness in a life of suffering. This is exactly what Existentialism
proposes, that it is not possible to know the truth, so it is up to the individual to create his or her
own, and then create their own purpose. Merriam–Webster defines the philosophy theory of
Existentialism as a "...philosophical movement embracing diverse doctrines but centering on
analysis of individual existence in an unfathomable universe and the plight of the individual who
must assume ultimate responsibility for acts of free will without any certain knowledge of what is
right or wrong or good or bad." But Existentialism is not a concept that can simply be defined in one
fell swoop. Throughout our studies of philosophy, I found there to be two main concepts that act as
the foundation for the basic
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Reaction Paper On The Perfect Storm
Sebastian Junger began to write The Perfect Storm "without even knowing it" (Junger XIV). His
personal experience with the storm was "...standing on Gloucester's Back Shore watching thirty foot
swells advance on Cape Ann..." (Junger XIV). The next day, Junger read an article in the newspaper
about a Gloucester boat (The
Andrea Gail
) that was believed to be lost at sea. He saved a clipping of
that article and from then on, Junger began unknowingly writing the book. Junger witnessed this
destructive storm in action. He also watched the 30 foot swells crash on the Gloucester shore. These
personal connections persuaded Junger to write
The Perfect Storm
. Also, throughout the book,
Junger states that fishermen do not get the respect they deserve for their dangerous jobs. Upon
further research, it was found that Sebastian Junger used to work in a labor intensive job as well. He
was a climber for a tree company. After he was hurt on the job, Junger realized that dangerous work
was not written about a lot. As the terrible storm hit Gloucester and a fishing boat was lost at sea,
Sebastion decided he would shine light on another dangerous business, the open seas fishing
industry.
The subject of
The Perfect Storm
is the Andrea Gail and the storm that it was trapped and eventually
perished in. The subject is stated at the beginning of the book in the Forward. Here, Junger describes
his writing process, his inspiration, and the subject of his book. Throughout the book, Junger
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Reaction Paper
REACTION PAPER
It is said that effective teacher will use both assessment and evaluation regularly to improve student
learning and to guide instruction. Indeed, both have pivotal roles in the teaching–learning process
yet, somehow they do differ in many ways. Assessment and evaluation measure whether or not
learning and/or learning objectives are being met. One could look at assessment and evaluation as
the journey (assessment) versus the snapshot (evaluation). (Sue Watson, 2009) Assessment requires
the gathering of evidence of student performance over a period of time to measure learning and
understanding. Evidence of learning could take the form of dialogue, journals, written work,
portfolios, and tests along with many other learning
...show more content...
In this program, teachers serves as active facilitators during the teaching–learning process.
Another major change in our country's educational landscape is the implementation of the so–called
K+12
education
. Recently, President Aquino led the formal launching of the K+ 12 reformed basic
education program at Malacañang, which makes mandatory kindergarten education for five–year–
old children and two additional two years of senior high school for all students. The President noted
that the Philippines is the only country in Asia and one of only three in the world – two of which are
in Africa – with a 10–year basic education program. "How do Filipinos become competitive if from
the very beginning we are already at a disadvantage in the number of years of studying and training?
What we want is to give the next generation a strong foundation." (Aquino, 2012) The curriculum of
the K+12 program will focus on the core subjects –Mathematics, Science and English– with
electives that are sensitive and responsive to the learners' interest and local industry needs. The
Department of Education (DepEd) enhanced curriculum by decongesting academic workload,
giving students more time to master competencies and participating in co–curricular activities and
community
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Essay on Reaction Time
Reaction Time
Objective: To determine reaction time and to access the accuracy of the measured time.
Equipment: Timer, pencil or pen, meter stick, coffee filter, and metal ball
Discussion: The significance of this experiment is to help us measure and understand our reaction
time. Reaction time is the amount of time between something happening and you responding to it.
We also did some free fall experiments with a ruler, a coffee filter, and a steel ball. This means that
we dropped objects from a resting position that has nothing attached to it is only under the influence
of gravity. Since we have a few seconds delay starting and stopping a timer after the object has
begun to drop and after it hits the floor we used the measurements
...show more content...
The reaction times for my group was .26. .17, .1453, .15479 seconds. My average catch was .1035
meters and my
reaction time
was .1453 seconds. I had the lowest reaction time. I accredit my
reaction to the fact that I concentrated on the ruler falling and blocking everything else out. Then we
took a coffee filter and used the meter stick and dropped it 10 times from the top of meter stick
while timing. We found that the
mean
of the coffee filter free fall was 3.80 seconds and the mean
deviation
was +/–.523 seconds. Then we took the metal ball and dropped it 10 times from the top of
the meter stick while timing. We found that the mean of the steel ball time was .577 seconds and the
mean deviation was +/– .115 seconds. The last event we measured for reaction was our heart beats.
We recorded the time it took to count 100 heart beats. It took me 1 minute 6 seconds and 93
hundredths of seconds to count out 100 heart beats. When we evaluated the possible percentage of
error we found that we had 25.18% of error of reaction time for the metal ball which is high. We
found that there was a 3.82% of error of reaction time for the coffee filter this is relatively low. I
found that I had .22% of error of reaction time for my count of heart beats is relatively low. There
are number of different reasons we could have source of errors for the free fall experiments. One
could be human reaction which would be timing. If we start the timer after the ball began to drop
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Reaction Paper On Stress
Have you ever wanted to pull your hair out or just yell at someone because you have a lot of
pressure on you? This is called stress. Stress originates from a wide range of things and is the reason
of many problem in a person's life. There are three main types of stress acute stress, episodic acute
stress, and
chronic stress
. Each has their own characteristics, symptoms, duration, and treatment
approaches. From work
stress
to grieving stress there are different ways to cope with it. "Stress
occurs when pressure exceeds your perceived ability to cope" (Palmer 26). So, it is not just external
pressure, for example achieving due dates that leads to stress, however whether you trust that you
can adapt a circumstance that you see as essential or undermining. Research has demonstrated that
there is a genuine physiological distinction amongst pressure and stress. Individuals encountering
stress have larger amounts of the different stress hormones in their circulatory system than
individuals who feels just challenged. The imperative point to note is this varies from individual to
individual. One individual's pressure is someone else's stress. Everybody has distinctive stress
trigger. Work stress tops the list, according to survey. Forty percent of U.S. labors confess to
encountering office stress and one–quarter say work is the greatest sources of their lives.
Circumstance that are probably going to cause stress are those that are unusual or uncontrollable,
uncertain vague or
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Climate Change Reaction Paper
What characterises academic writing?
It is perhaps tempting to think that Academic Writing (AW) is guided by a fairly homogeneous set of
rules and aspects. This is so, possibly because we frequently see books with titles such as Academic
Writing and Writing Academic English, and we hear from fellow students, teachers, colleagues and
friends about the need for skills within written academic English.
However, even if there arguably are core aspects and skills, it is important to acknowledge the fact
that many differences exist when it comes to how certain disciplines grapple the challenges of
writing
academic discourse. The question, then, is whether we should rather talk about Academic
Writings, to highlight this heterogeneity.
A General
...show more content...
| | – Subjective and personal, e.g.
In my essay I will attempt to...
– Asking rhetorical questions, e.g.
How can this be so? |
On the whole, this means that academic writing is generally characterised by a high degree of
formality. However, the characteristic of impersonal voice, for example, is not without contention.
Even though tables of comparison like the one above can sometimes serve the purpose of
highlighting differences between writing that is more academically oriented, and less formal writing,
which is used in other domains, it can indeed be dangerous to paint such a polarised picture.
We need to remember, for example, that a more subjective and personal style does occur in some
text types in some academic disciplines. Therefore, a table like the one presented above should be
treated with caution and only be seen as a very coarse and simplified view of the characteristics of
academic writing.
Another example of advice given to students on how to write academic English is taken from a
textbook for graduate students written by Swales and Feak (1994). In the introductory chapter, the
authors present six characteristic considerations of academic writing: audience, purpose,
organisation, style, flow, and presentation. When discussing style, they give the following advice on
how to maintain a formal academic writing style.
–––––––––––––––––––––––––––––––––––––––––––––––––
Swales & Feak (1994) on how to maintain a formal academic
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Reaction Paper About Stress
Stress can be a reaction to a short–lived situation, such as being in traffic. Or it can feel like it lasts
for ever if you're dealing with any serious situation. Stress often occurs in response to situations that
are perceived as being difficult to handle or threatening. Each person reacts to stress differently and
common causes for
stress
include illness, injury, fear, and
anxiety
. Personality traits also increase the
risk for stress, they include over–competitiveness, excitability, impatience, aggression, and
pessimism. Stress is dangerous, it can interfere with your ability to live a normal life over an
extended period. The annual Stress in America survey measures attitudes and perceptions of stress
through the nation, and find the leading sources of stress, common behaviors used to manage stress
and the impact that stress has on our lives. Since the first survey in 2006, stress levels have
gradually decreased for Americans, with results from the 2016 poll showing the lowest overall
reported stress level in 10 years. However, an additional poll was conducted in early 2017 shows
more Americans a reporting symptoms of stress because of personal safety.
Identifying Signs of Stress Everyone experiences stress, it can come from varieties of things such as
school or work, sustaining different types of relationships, or managing life in general. Too much
stress can create unnecessary challenges, and people can be unaware when they are experiencing
feelings of stress. You
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Reaction Paper About Happiness
Happiness is the way of life and should be the only thing that people should feel. People want to be
happy, there are things in the world that make us happy. Without happiness we wouldn't have
anything to live for. The philosophy of happiness is the one thing that is able to help guide us
through the problems that have all these walls but one way of getting out. Unhappy thoughts can fill
our
mind
and lead to negative impacts, but you can think about
happiness
and start thinking positive
That can take your mind off of all the bad in life because there shouldn't be any bad. People can
become happy from having friends and family, fair rights and freedom, and the amount of people's
income. Friends and family are born with us, they make us feel happy and special. We will always
have the moments with our family that you can never forget. There are things that you can't tell your
friends but you can tell your friends because it's really special and precious to you. Even though you
can't tell friends specific stuff you are still able to have the funny moments that you can still laugh at
later in life. When you look back at the moments you can tell yourself that you are happy with the
family and friends you have. Similarly, to Chains when Isabel is still trying to be happy since she
lost Ruth and her mother. Since Isabel has been away from her mother and Ruth for so long, she is
getting unhappy and has nothing to be happy about. In those times she looks back at the memories
she has
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Holocaust Reaction Paper
My overall opinion on what we have read in class and seen in movies is that the holocaust was a
dreadful thing for anyone to go through. I don't think it was okay to get rid of a whole race just
because someone wants a superior race. I have learned in Hana's suitcase that kids can make a
difference. A young woman was determined to find out about a young girl named Hana and her
whole life. I hope the
Nazi party
realized that what they were doing was wrong then again, they
contributed on what
Adolf Hitler
was telling them to do. Something that bothers me is that nobody
stood up for the
Jews
. Others were bystanders and just watched what the Germans were doing but
never said
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Related Questions
decomposition: HgO(s) →
Express your answer as a complete chemical equation, with reactants and products.
the phases in your answer.
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Remaining Time! 02:29:4.
Consider the balanced chemical equations shown below. When a 6.00 g sample of a mixture of iron (Fe) and
aluminum (Al) is treated with excess HCl(aq), 0.177 moles of H2 are obtained. What is the mass percentage of
Fe in the original mixture? Choose the closest answer.
Fe(s) + 2 HCI(aq) FeCl2(aq) - + H2(g)
2 Al(s) +6 HC((aq) 2 AICI3(aq) + 3 H2(g)
96 %
69 %
47 %
33 %
17 %
Rack
Question Menu -
O O
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For the reaction 2N2O5(g) ® 4NO2(g) + O2(g), the following data were collected.
t (minutes)
[N2O5] (mol/L)
0
1.24 x 10–2
10
0.92 x 10–2
20
0.68 x10–2
30
0.50 x 10–2
40
0.37 x 10–2
50
0.28 ´ 10–2
70
0.15 ´ 10–2
The initial rate of production of NO2 for this reaction is approximately:
A)
6.4 x10–4 mol/L • min
B)
3.2 x10–4 mol/L • min
C)
1.24 x 10–2 mol/L • min
D)
1.6 x 10–4 mol/L • min
E)
none of these
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rmal text
BIUA
Arial
17.2
+
. 1. .
2. | 3 | 4
in blue ink using complete sentences.
1. How is a physical change different from a chemical change?
2. How do you know a chemical reaction has happened?
3. Give an example of a chemical change.
4. How do you know this chemical reaction has taken place?
5. Name three different properties you can test before and after a chemical reaction
to determine if a new substance was formed.
6. What does a catalyst do in a chemical reaction?
7. Are the number of atoms before and after a chemical reaction the same? Why?
8. What are two ways you can tell that the steel wool in the video underwent a
chemical reaction?
Support | Schoology Blog | PRIVACY POLI
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need help with the chemical reaction that took place
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Write the formulas for the reactant(s) of this reaction.
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Please answer Part E
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Abbreviations for the reaction are given alongside the reactions. Highlight the correct letter for the answer.
2(C5H5) + Fe → Fe(C5H5)2 S, D, SR, DR or C
SeCl6 + O2 → SeO2 + 3Cl2 S, D, SR, DR or C
2MgI2 + Mn(SO3)2 → 2Mg(SO3) + MnI4 S, D, SR, DR or C
O3 → O + O2 S, D, SR, DR or C
2NO2 → 2O2 + N2 S, D, SR, DR or C
S means Synthesis
D means decompisition
SR means single replacement
Dr means double replacement
C means combustion
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What is true for this chemical reaction: CO₂(g) + 4H₂(g) = CH₂(g) + 2H₂O(g)?
Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer.
a
b
C
Reaction Changes
Homework Unanswered Due Today, 11:59 PM
d
AHrxn > 0; ASrxn > 0
AHxn 0
AHxn 0; ASxn < 0
Unanswered. 2 attempts left
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O CHEMICAL REACTIONS
Identifying combination, decomposition, single..
Classify each chemical reaction:
Reaction
Туре
Mg(s) + 2HBr(аq)
MgBr, (aq) + H, (g)
choose one
K, CO, (s) → K,0(s) + Co, (g)
choose one
16K (s) + S, (s) → 8K,S (s)
v choose one
combination
decomposition
single substitution
double displacement
none of the above
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13. A mixture of Co(g) and Ozlg) is placed in a rigid, sealed container as shown in the particle diagram. The
Co(g) reacts with the 02(g) according to the following reaction.
2c0(g) + O2(g) → 2CO2(g)
Which of the following diagrams correctly illustrates the reaction mixture after the reaction goes to
completion?
000
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(A)
(C)
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C2021 Illuminate Education TM Inc.
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Mg + 2HCl → MgCl2 + H2
This experiment was performed two times.
All values are valid to one decimal place. If the decimal place is not shown, add a ".0"
Experiment Mass of Mg (mg) Starting Temperature (°C) Final Temperature (°C)
1
2
19.6
20.7
19.5
20.7
33
33.5
The previous page contained data from two experimental runs for the reaction between magnesium and
hydrochloric acid.
Mg+ 2HC! MgCl2 + H2
First, how many moles (n) of Mg reacted with the HCI? Use the average value of the two masses from
your provided data set.
Answer: 0.001658
I
Mg + 2HCI MgCl2 + H2
Next, what is the amount of heat absorbed by the water (qsurr) in the experiment? Use the average AT
from your data to calculate a single value for q. Report your answer in J.
Remember to consult the lab manual and/or the video for any values you might need.
Answer:
Mg + 2HC! MgCl2 + H2
Finally, calculate A,H for this reaction and report your answer in kJ/mol.
Answer:
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Hydrogen, when combined with oxygen in a chemical reaction, forms water. This is an example of which type of chemical reaction?
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What I Can Do
Directions: Use the words inside the box to correctly fill in the blanks. Write your
answer on your answer sheet.
catalyst
dilute
surface area
concentration
temperature
collisions
energy
rate of reaction
heat
1. A freshly exposed surface of metallic sodium tarnishes almost instantly if
exposed to air and moisture, while iron will slowly turn to rust under the
same conditions. In these two situations, the
quickly or slowly reactants turn into products.
2. Adding
the particles of the reactants to move more quickly, resulting in more
refers to how
will increase the rate of reaction because this causes
collisions and more
3. Removing heat will lower the
reactants to slow down, resulting in less frequent collisions.
causing the particles of the
4.
refers to how much solute is dissolved in a solution. If there is
a greater concentration of reactant particles present, there is a greater
chance that
higher rate of reaction.
among them will occur. More collisions mean a
5. A…
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According to Wikipedia,
Radiocarbon dating (also referred to as carbon dating or carbon-14 dating) is a method for
determining the age of an object containing organic material by using the properties of
radiocarbon, a radioactive isotope of carbon.
The method was developed in the late 1940s at the University of Chicago by Willard Libby, who
received the Nobel Prize in Chemistry for his work in 1960. It is based on the fact that carbon-
14 is constantly being created in the atmosphere by the interaction of cosmic rays with
atmospheric nitrogen. The resulting carbon-14 combines with atmospheric oxygen to form
radioactive carbon dioxide, which is incorporated into plants by photosynthesis; animals then
acquire carbon-14 by eating the plants. When the animal or plant dies, it stops exchanging
carbon with its environment, and thereafter the amount of carbon-14 it contains begins to
decrease as the carbon-14 undergoes radioactive decay. Measuring the amount of carbon-14 in
a sample from a…
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Which of the following KT graphs corresponds to this chemical reaction: 4NH3(g) +50₂(g) = 4NO(g) + 6H₂O(l)?
HomeworK
6
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How do I do this? What does it mean?
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Answer it asap i will upvote you
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Consider the reaction where the reactants are converted to the products.
HO +C6H5OH
H2O + C6H5O-
"reactants"
"products"
The dotted arrow is a placeholder. Select the descriptor that best describes the relationship between the "reactants"
and "products".
The arrow should be:
O O
arrow_forward
Suppose a pair of chemical compounds A and B can react in two different ways:
Reaction 1 gives product C.
A+B → C
A+B-D
Reaction 2 gives product D.
The following facts are known about the two reactions:
• Reaction 1 is exothermic and Reaction 2 is endothermic.
• If a reaction vessel is charged ("filled") with A and B, then at first D is produced faster than C.
Use these facts to sketch a qualitative reaction energy diagram for both reactions.
Note: because these sketches are only qualitative, the energies don't have to be exact. They only have to have the right relationship to each other. For example,
if one energy is less than another, that fact should be clear in your sketch.
energy
Reaction 1
reaction coordinate
energy
Reaction 2
reaction coordinate
0
L4
A
#
Ba
arrow_forward
In a chemical reaction, a certain compound changes into another compound at a rate pro-portional to the unchanged amount. There is 40 grams of the original compound initially
and 35 grams after 1 hour. When will 75 percent of the compound be changed?
arrow_forward
A student conducts an experiment of the
combustion of ethane in the presence of
oxygen. The graph below represents data
collected in the lab.
COMBUSTION OF ETHANE
+ethane +02 - H20
120
100
80
60
40
20
10
15
20
-20
TIME
Which line on the graph above would
represent the limiting reactant and which
line on the graph above would represent
the excess reactant for the combustion of
ethane? In your answer, cite specific
evidence from the graph to support your
determination.
NUMBER OF MOLES
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unuunRINO
Consider these reactions, where M represents a generic metal.
2 M(s) + 6HCl(aq) →→2 MC1₂ (aq) + 3 H₂(g)
HCl(g) →→→ HCl(aq)
-
H₂(g) + Cl₂(g) →→→ 2 HCl(g)
MC1₂ (s) → MC1₂ (aq)
Use the given information to determine the enthalpy of the reaction
2 M(s) + 3 Cl₂(g) → 2 MC1₂ (s)
esc
1.
2.
3.
4.
AH =
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x10
TOOLS
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AH₁ = -651.0 kJ
AH₂ = -74.8 kJ
AH3 = -1845.0 kJ
AH4 = -152.0 kJ
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13. A student is investigating different types
of reactions. Which of the
following actions would be an example
of an endothermic reaction?
evaporating water
O burning sugar
melting ice cubes
baking bread
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A chemical reaction that does not completely convert reactants to products, but rather
results in mixture of reactants and products that remains constant, until the experimental
conditions are changed, is said to be in a state of chemical
arrow_forward
Classify each chemical reaction:
Reaction
BaCO₂ (s)
BaO(s) + CO,(g)
Mg(s) + FeCl₂ (aq) → MgCl₂(aq) + Fe(s)
2Na(s) + 2HCl(aq) → 2NaCl(aq) + H₂(g)
Type
✓ choose one
combination
decomposition
single displacement
double displacement
none of the above
X
Ś
arrow_forward
Two chemicals at room temperature are mixed and their container starts to feel warm to the touch. What type of reaction is occurring?
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SEE MORE QUESTIONS
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Publisher:Cengage Learning
Related Questions
- decomposition: HgO(s) → Express your answer as a complete chemical equation, with reactants and products. the phases in your answer.arrow_forwardRemaining Time! 02:29:4. Consider the balanced chemical equations shown below. When a 6.00 g sample of a mixture of iron (Fe) and aluminum (Al) is treated with excess HCl(aq), 0.177 moles of H2 are obtained. What is the mass percentage of Fe in the original mixture? Choose the closest answer. Fe(s) + 2 HCI(aq) FeCl2(aq) - + H2(g) 2 Al(s) +6 HC((aq) 2 AICI3(aq) + 3 H2(g) 96 % 69 % 47 % 33 % 17 % Rack Question Menu - O Oarrow_forwardFor the reaction 2N2O5(g) ® 4NO2(g) + O2(g), the following data were collected. t (minutes) [N2O5] (mol/L) 0 1.24 x 10–2 10 0.92 x 10–2 20 0.68 x10–2 30 0.50 x 10–2 40 0.37 x 10–2 50 0.28 ´ 10–2 70 0.15 ´ 10–2 The initial rate of production of NO2 for this reaction is approximately: A) 6.4 x10–4 mol/L • min B) 3.2 x10–4 mol/L • min C) 1.24 x 10–2 mol/L • min D) 1.6 x 10–4 mol/L • min E) none of thesearrow_forward
- rmal text BIUA Arial 17.2 + . 1. . 2. | 3 | 4 in blue ink using complete sentences. 1. How is a physical change different from a chemical change? 2. How do you know a chemical reaction has happened? 3. Give an example of a chemical change. 4. How do you know this chemical reaction has taken place? 5. Name three different properties you can test before and after a chemical reaction to determine if a new substance was formed. 6. What does a catalyst do in a chemical reaction? 7. Are the number of atoms before and after a chemical reaction the same? Why? 8. What are two ways you can tell that the steel wool in the video underwent a chemical reaction? Support | Schoology Blog | PRIVACY POLIarrow_forwardneed help with the chemical reaction that took placearrow_forwardWrite the formulas for the reactant(s) of this reaction.arrow_forward
- Please answer Part Earrow_forwardAbbreviations for the reaction are given alongside the reactions. Highlight the correct letter for the answer. 2(C5H5) + Fe → Fe(C5H5)2 S, D, SR, DR or C SeCl6 + O2 → SeO2 + 3Cl2 S, D, SR, DR or C 2MgI2 + Mn(SO3)2 → 2Mg(SO3) + MnI4 S, D, SR, DR or C O3 → O + O2 S, D, SR, DR or C 2NO2 → 2O2 + N2 S, D, SR, DR or C S means Synthesis D means decompisition SR means single replacement Dr means double replacement C means combustionarrow_forwardWhat is true for this chemical reaction: CO₂(g) + 4H₂(g) = CH₂(g) + 2H₂O(g)? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a b C Reaction Changes Homework Unanswered Due Today, 11:59 PM d AHrxn > 0; ASrxn > 0 AHxn 0 AHxn 0; ASxn < 0 Unanswered. 2 attempts leftarrow_forward
- O CHEMICAL REACTIONS Identifying combination, decomposition, single.. Classify each chemical reaction: Reaction Туре Mg(s) + 2HBr(аq) MgBr, (aq) + H, (g) choose one K, CO, (s) → K,0(s) + Co, (g) choose one 16K (s) + S, (s) → 8K,S (s) v choose one combination decomposition single substitution double displacement none of the abovearrow_forward13. A mixture of Co(g) and Ozlg) is placed in a rigid, sealed container as shown in the particle diagram. The Co(g) reacts with the 02(g) according to the following reaction. 2c0(g) + O2(g) → 2CO2(g) Which of the following diagrams correctly illustrates the reaction mixture after the reaction goes to completion? 000 00 00 000 (A) (C) 00 000 000 000 000 000 000 00 00 000 000 000 000 (D) 000 000 (B) C2021 Illuminate Education TM Inc. DELL F1 F2 F3 F4 6x F5 F6 F9 F10 F11 Priscr %23 24 & 2 4 6 80 W T Y G K 2arrow_forwardMg + 2HCl → MgCl2 + H2 This experiment was performed two times. All values are valid to one decimal place. If the decimal place is not shown, add a ".0" Experiment Mass of Mg (mg) Starting Temperature (°C) Final Temperature (°C) 1 2 19.6 20.7 19.5 20.7 33 33.5 The previous page contained data from two experimental runs for the reaction between magnesium and hydrochloric acid. Mg+ 2HC! MgCl2 + H2 First, how many moles (n) of Mg reacted with the HCI? Use the average value of the two masses from your provided data set. Answer: 0.001658 I Mg + 2HCI MgCl2 + H2 Next, what is the amount of heat absorbed by the water (qsurr) in the experiment? Use the average AT from your data to calculate a single value for q. Report your answer in J. Remember to consult the lab manual and/or the video for any values you might need. Answer: Mg + 2HC! MgCl2 + H2 Finally, calculate A,H for this reaction and report your answer in kJ/mol. Answer:arrow_forward
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SEE MORE QUESTIONS
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- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage Learning
Chemistry: The Molecular Science
Chemistry
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:Cengage Learning
Chemistry: Principles and Reactions
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ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:Cengage Learning