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Short
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Question
1
A
historical
research
type
wherein
there
is
a
conscious
effort
of
information
preservation
like
in
diaries
and
epitaphs.
Correct
Mark
1.00
out
of
Select
one:
1.00
O
a.
Appreciative
inquiry
"
Flag
question
O
b.
Historical
research
@®
c.
Deliberate
historical
research
O
d.
Incidental
historical
research
Clear
my
choice
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Marks
for
this
submission:
1.00/1.00.
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COWLv2 | Online teaching and I
[References]
Use the References to access important values if neede-
A recipe calls for a cup and a half of coconut oil. Calculate its mass in grams if its density is 0.924
g/cm³. (
1 qt=4 cup,
1 qt = 0.946 L).
Mass=
Submit Answeli
g
prod02-cnow-owl.cengagenow.com
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reactant - product
If there are 4 grams of reactant, how many grams of product are produced by the chemical reaction?
es 4)
A)
O grams
B)
2 grams
C)
4 grams
D)
8 grams
Law of Conservation of Matter
(SPS3.a) Conservation Of Mass In Chemical Reactions
Regular
Calc
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Hint
Calc
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The Bay of Fundy in Nova Scotia, Canada is reported to have the largest tides in the
world with high tide and low tide occurring two times per day. The tides can measure
ft
in height. At the Hopewell Rocks at Hopewell Cape,
over approximately 50.0
on a specific day height increase was recorded as a rate of 6.08 feet per hour. What
is the rate in meters per second ?
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A
Syllabus
enzyme B catalyzed
enzyme A catalyzed
uncatalyzed reaction
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Pearson eText
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v Correct
Enzymes lower the activation energy of a chemical reaction. This means that the reaction is more likely to proceed, and results in faster formation of products.
Part B
Complete this vocabulary exercise relating to enzymes.
Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer.
• View Available Hint(s)
Reset Help
cofactor
1. A substrate binds to an enzyme at the
where the reaction occurs.
substrate
2. A small organic molecule necessary for the function of some enzymes…
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Green Dragon Vineyards makes and sells wine in different size bottles. Decide whether each property of their wine bottles listed in the table below
is extensive or intensive, if you can. If there's not enough information to decide, check the can't decide box.
The average recommended serving size.
The time it takes to pour out one serving of the wine.
The time it takes to pour out all the wine in the bottle.
extensive
O intensive
O (can't decide)
O extensive
O intensive
O (can't decide)
O extensive
O Intensive
O (can't decide)
X
?
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3. An object has a mass of 2.62114 g. The object is weighed accurately on the three types of balances described in this experiment. What mass should be recorded for the object in each case?Centigram balance :Electronic balance (intermediate sensitivity):Electronic balance (high sensitivity):
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Pt Periodi x
O (13) Em x
A R Chem x
b Ask a 0 x
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Bb ChemicX
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R Chem Chem Math Quiz
2 Madison Clark :
1573
1) Listen
Given the balanced equation representing a reaction:
C3H8(g) + 502(g) → 3CO2(g) + 4H20(g)
What is the total number of moles of O2(g) required for the complete combustion of 1.5 moles of C3H8(g)?
1.
0.30 mol
2.
1.5 mol
4.5 mol
4.
7.5 mol
Submit Answer
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Which of the following errors are determinate errors?
Personal errors.
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The two molecules shown below have the exact same chemical formula and molar mass (C.H10 and
58.12 g/mol).
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38
sentences.
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Hydrogen gas holds promise as an alternative fuel to gasoline. Calculate the mass of H₂ gas in a 38.3 L fuel tank at a pressu
2.42 x 104 mmHg and a temperature of 17.4 °C.
Paraphrasing Toof
Check Answer
Attempt 4
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Use the References to access important values if needed for this question.
The compound cyclohexanol, C6H120, is a good fuel. It is a liquid at ordinary temperatures. When the liquid is burned, the reaction involved is
2 C6H120(t) + 17 02(g)→12 CO2(g) + 12 H20(g)
The standard enthalpy of formation of liquid cyclohexanol at 25 °C is -348.2 kJ mol-1; other relevant enthalpy of formatton values in kJ mol1 are:
C6H120(g) = -286.2 ; CO2(g) = -393.5 ; H20(g) = -241.8
(a) Calculate the enthalpy change in the burning of 3.000 mol liquid cyclohexanol to form gaseous products at 25°C. State explicitly whether the reaction
is endothermic or exothermic.
= oHV
(b) Would more or less heat be evolved if gaseous cyclohexanol were burned…
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Question 4 (0.5 points)
SHOW YOUR WORK.
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If 35.45 mL of 0.8121 M sodium carbonate solution reacts with excess lead (III)
nitrate solution to form aqueous sodium nitrate and solid lead (III) carbonate, how
many grams of lead (III) carbonate is formed?
On your paper with your name and date:
1. Go from ionic compound name to formula (review Chp 5 as much as needed)
2. Balance the equation (review Chp 7 if needed).
3. Do the calculation showing ALL units, just like I did in solution stoichiometry
lecture.
a #
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Acetylene and oxygen react to form carbon dioxide and water, like this:
2C₂H₂(g) +50₂(g) → 4CO₂(g)+2H₂O(g)
perturbation
Some H₂O is removed.
Some O₂ is added.
Explanation
Q
A
Suppose a mixture of C₂H₂, O₂, CO₂ and H₂O has come to equilibrium in a closed reaction vessel. Predict what change, if any, the perturbations in the table.
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Chemistry 100
Week 11 (20/5 - 24/5)
The correct answer is:
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Mark 0.00 out
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CuO x
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C. NaBr
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Assessment
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10
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Which one of the following cannot form a
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sodium chloride structure?
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8. A particular enzyme at a research facility is being studied by a group of graduate
students. This enzyme has a Km value of 5.0 X 106 M. The students study this enzyme
with an initial substrate concentration of 0.055 M. At one minute, 7 µM of product
was made. What is the Vmax?
30
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For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).
BIUS
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26) The floor tiles in SE 27 are about 1 square foot and the lab is about 25 tiles wide and about
36 tiles from front to back. When the emergency shower was demonstrated, in 10. seconds
the water in the trash can was about 1 foot deep. One student estimated this was 2.5 gallons.
Estimate how deep the room will get in inches after a 15 minute shower. List 3 simplifving
assumptions you make in this calculation
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fiDw
ill it cost2 The density of gold is
27l An artist plans to apply gold leaf to a painting with an area of 2.32 f? and a thickness of 1.50
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