# Mathmatics Test - Chemistry

A Project to Address Mathematics Prerequisites in Introductory Courses

Produced by the Center for Support of Teaching and Learning, Syracuse University under a grant from the Fund for the Improvement of Post Secondary Education (8/98)
No previous knowledge of chemistry is necessary for this test

Directions:
For each multiple choice test question, select the correct answer by clicking on the button to the left of your answer choice. After you have finished the entire examination, click on the CHECK button at the bottom of the page to receive your score.

Use the following information to answer questions 1 - 3.

 A 30 gram compound contains: 12 grams of Carbon, 2 grams of Hydrogen, and 16 grams of Oxygen.

1. What percentage of the entire compound is Carbon?
 12 % 30 % 40 % 360 %

2. Approximately what percentage of the entire compound is Oxygen?
 16 % 25 % 50 % 75 %

3. Approximately 7 % of the compound is Hydrogen. If there are 850 total grams of the compound, approximately how many grams of Hydrogen does the compound contain?
 7 grams 60 grams 112 grams 5,950 grams

Use the following graph to answer questions 4 - 6.

Solubility of some ionic salts at different temperatures

4. At a temperature of 50 degress C, what is the approximate solubility of KNO3 ?
 32 40 50 75

5. As temperature increases, which statement(s is (are) true? ) (NOTE: The numbers in the answers are to be taken to be subscripts.)
 The solubility of Ce2(SeO4)3 decreases. The solubility of NaCl decreases. The solubility of KNO3 increases. The solubility of Ce2(SeO4)3 decreases, and the solubility of KNO3 increases.

6. The solubility of which compound changed at the slowest rate as temperature increased?
 KNO3 NaCl Ce2(SeO4)3 The solubility of all three compounds changed at the same rate.

7. 1 inch equals 2.54 centimeters. How many centimeters equal 15 inches?
 38.1 centimeters 5.91 centimeters .1693 centimeters 17.54 centimeters

8. 1 gram equals 1000 milligrams. How many grams equal 4200 milligrams?
 420,000 grams 42,000 grams 42 grams 4.2 grams

9. Which statement best describes the line graph below?
 The reaction time and energy rose sharply, then fell and finally both remained the same. The energy increased, decreased, then remained constant while reaction time remained unchanged. As the reaction time increased, the energy rose sharply, fell sharply and then remained the same. As the energy increased, the reaction time increased. As energy decreased, the reaction time decreased and when energy remained the same, reaction time remained the same.

10. A chemistry student collected the following table of temperature and time data. Which line most closely represents the data? Click the button below your answer choice.
 Time in Minutes Temperature in degrees C 0 10 5 15 10 25 15 35 20 40

11. Which graph depicts a line of best fit for the data presented in a scatter plot of pressure vs. termperature points? Click the button below your answer choice.

12. A chemist finds that .000364 grams of sodium has dissolved in water. This number could be written as:
 grams grams grams grams

13. The speed of light can be written as meters per second. This value can also be written as:
 38,000 meters per second .00000003 meters per second 300,000,000 meters per second 3,000,000 meters per second

Use the following equation to answer question 15.

 Force = mass x constant acceleration of gravity.

14. If a substance has a mass of and an estimate for the constant acceleration of gravity is as , compute the force exerted by the substance.
 grams grams grams grams

Use the following equation to answer question 15.

15. If the force exerted by an object is on an area of then the pressure is equal to:
 grams grams grams grams

16. Charles Law relates the temperature of a gas to the volume of a gas. An extension of this is the following ratio relationship:

If T2 = 400K, T1 = 300K and V1 = 30L then V2 = ?
 12000 L 9000 L 10.3 L 40 L

17. The Ideal Gas Law is PV = nRT. Solve this equation for P.
 P = VnRT P = nRT+V P = nRT-V

18. Compute a value for n using the Ideal Gas Law PV = nRT when:

 P = 10, V = 50, T = 250, and R = .08
 n = .16 n = 25 n = 480 n = 520

19. The van der Waals equation is given by:

Solve this equation for P.

Go to the Review Materials