Recitation Week 3

The concentrations of three gaseous chemicals are measured over time (see figure, below). Choose two different significant points in time for this reaction and explain what is happening at the chosen times. Support claims with evidence from grade 12 chemisty concepts.

FINAL Experiment 1- January 2021_-789644623 - Saved Layout Review View Table A friend of yours went panning for gold last weekend and found a nugget that appears to be gold. With your newfound scientific prowess, you set out to determine if it is really gold. Your tests show that the nugget has a mass of 7.6 g. Immersing the nugget in water raised the volume from 7.22 mL to 8.06 mL. The density of gold is 19.32 g/cm3. What will you tell your friend? acer

please solve questions 2-7

Use the information given here to answer both questions (4 and 5).  For the fictitious reaction:  AB → A + B Some data was collected measuring the [AB] at certain time intervals.  This data was then graphed as described below. A graph of 1/[AB] versus time (s) gives a straight line with the equation: y = 0.0052x + 0.1135 and a R2 = 0.9995.  A graph of ln[AB] versus time (s) gives a straight line with the equation: y = -0.0068x + 1.725 and a R2 = 0.8925.   Assume the data doesn't fit a zero order reaction. What is the rate law for this reaction? Select one: a. Rate = k[AB]2 b. Rate = k[A][B] c. Rate = k[AB] d. Rate = k   Using the data from the previous question. What is the value of the rate constant for the given reaction? Select one: a. k = 0.0052 M-1s-1 b. k = 0.0157 Ms-1 c. k = 0.0068 s-1 d. There is no way to determine the value of the rate constant from the given information.

Please help me complete question 4

Each word should be moved from the answer bank toward the answer side.

If 2.0 × 10-4 moles of  H2O2H2O2 in 50 mL solution is consumed in 3 minutes and   25  seconds, what is the rate of consumption of H2O2H2O2?  Express the rate in mol per liter·second to two significant digits.

Question 20 of 26 > While driving your rental car on your vacation in Europe, you find that you are getting 13.4 km/L of gasoline. What does this value correspond to in miles per gallon? 13.4 km/L = mi gal about us privacy policy terms of use contact us help careers DD F12 F11

. Complete the following table. Time (minutes) 0 2 4 6 8 10 Concentration of crystal violet, [R] 7.02 x 10-6 5.42 x 10-6 4.22 x 10-6 3.25 x 10-6 2.41 x 10-6 1.84 x 10-6 In [R+] Prepare three graphs using the attached graph paper: i) plot [R] (y-axis) versus time, ii) plot In[R] versus time, and iii) plot 1/[R+] versus time. How do these three plots differ? Which is the most linear? 1/[R+]

Briefly define the phrase “fit-for-purpose” in relation to analytical chemistry.

Please help me with my Chemistry assignment. Thanks so much!!

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…

Every valentine’s day, CVS sells chocolate-covered cherries.  The chocolate-covered cherries are like a mini cake with a cherry inside.  The cake comprises a combination of sucrose (powder sugar), butter, cherry juice, and an enzyme (invertase).  Time (hours) Sucrose Concentration (g/cm3) 0 0.844 24 0.681 48 0.550 96 0.357 192 0.153     While stored at 5.00C, the sucrose hydrolyzes to produce glucose and fructose.  The mixture of the glucose and fructose is a liquid called invert sugar. Below you will find the concentration of sucrose in the cake as a function of time.  For the cherries to be edible, the 85% of the sucrose must be hydrolyzed.  Before you start to answer the question, create a data table that comprises sucrose concentration in units of moles per liter.    Write the chemical reaction that demonstrates the hydrolysis of sucrose.   With the data, determine how long it will take for 85% of the sucrose to be converted into…

Name the following Fe(NO3)2

(a) The population of a large city grows very quickly for several years. Then the growth begins to slow, and the population remains constant for several years. After this, the population grows again, but slower than before. Population Population Population Population Time Time Time Time

Arrange the values according to magnitude. Greatest     Least Answer Bank 7.1×10−6 3.3×10−2 52000 9.0×10−6 2.2×105

Kindly solve this question correctly in 30 minutes and get the thumbs up please show me neat and clean work for Kindly provide correct solution

4) The intensity of gamma rays, X-rays, or any other radiation is A) inversely proportional to the cube of the distance from the source. B) inversely proportional to the distance from the source. C) inversely proportional to the square of the distance from the source. D) directly proportional to the square of the distance from the source. E) directly proportional to the distance from the source. dele (1