Chemistry B CFA 1 Review Quiz - Trimester 3 2014
This is the review quiz for the Chemistry B CFA 1. Please take and review answers at the end. You may take this quiz unlimited amount of times until a passing score is achieved. You will be given a test grade for this quiz; therefore please retake until you reach a score of 90% or above.
- 1.Molar Mass of glucose (CO2) in grams per mole? (Hint: Use periodic table and add molecular weights of the atoms)
- A.
340.0
- B.
180.0
- C.
110.0
- D.
78.0
- E.
44.0
- 2.What is the molar mass of H2 in grams per mole (Hint: Use periodic table and add molecular weights of the atoms)
- A.
15.0
- B.
2.0
- C.
4.0
- D.
5.2
- E.
3.5
- 3.What is the molar mass of NO2 in grams per mole. (Hint: Use periodic table and add molecular weights of the atoms)
- A.
16.2
- B.
46.0
- C.
44.0
- D.
13.1
- E.
None of the above
- 4.What is the molar mass of CH4. (Hint: Use periodic table and add molecular weights of the atoms)
- A.
16 grams per mole
- B.
20 grams per mole
- C.
24 grams per mole
- D.
30 grams per mole
- E.
14 grams per mole
- 5.A gas in a balloon measures 2.2 L 1.1 atmospheres and 32 degrees Celsius. The environment is changed and the balloon is now 1.8 L and 1.4 atmospheres. What is the new temperature? (Hint 1: Always change temperature to Kelvin scale. To change from Celsius to Kelvin: add 273) Hint 2: Pressure volume and temperature are all changed. Use the combined gas law:
- A.
317.6 K
- B.
33.32 K
- C.
384.3 K
- D.
0.02 K
- 6.A gas at a temperature of 80Celsius and a volume of 3.2 Liters is brought into an area with the temperature of 100 Celsius, what is the new volume if the pressure remains constant? (Hint : ALL GAS PROBLEMS MUST use the KELVIN temperature scale.) (To change from Celsius to Kelvin: add 273)
- A.
3.38 L
- B.
2.84 L
- C.
3.75 L
- D.
2.4 L
- 7.If pressure of a gas is 1.2 atmospheres with a volume of 12 L, how much pressure is exerted by the gas if the volume is changed to 9L? (Assume constant temperature)
- A.
.9 L
- B.
129.6 L
- C.
6.0 L
- D.
1.6 L
- 8.1. According to the Law of Conservation of Matter, the total mass of all the reacting substance is—
- A.
A. more than the mass of all the products.
- B.
B. more than the total mass of all the products and the reactants.
- C.
C. less than the total mass of all the products.
- D.
D. equal to the mass of all the products.
- 9.2. What are the coefficients that would correctly balance this reaction? ____Ni + ____C4H8N2O2 → ____Ni(C4H8N2O2)2
- A.
F. 1, 2, 1
- B.
G. 2, 2, 1
- C.
H. 2, 1, 1
- D.
J. 2, 2, 2
- 10.3. For the reaction HCl + NaOH --> NaCl + H2O, which reactant is the limiting reactant given 100.0 g of sodium hydroxide and 100.0 g of hydrochloric acid?
- A.
A. hydrochloric acid
- B.
B. sodium hydroxide
- C.
C. sodium chloride
- D.
D. water
- 11.4. In the reaction 2RbNO3 → 2RbNO2 + O2, how many moles of O2 are produced when 5.0 mol of RbNO3 decompose?
- A.
F. 1.0 mol
- B.
G. 2.5 mol
- C.
H. 3.0 mol
- D.
J. 7.5 mol
- 12.5. In the reaction 2 H2 + O2 → 2 H2O, how many moles of oxygen are required to fully react with 6.0 mol of hydrogen?
- A.
A. 3.0 mol
- B.
B. 6.0 mol
- C.
C. 12.0 mol
- D.
D. 18.0 mol
- 13.6. In the reaction 2 H2 + O2 → 2 H2O, what is the mole ratio of hydrogen to water?
- A.
A. 2 : 2
- B.
B. 2 : 1
- C.
C. 1 : 2
- D.
D. 4 : 4
- 14.7. In the reaction N2 + 3 H2 → 2 NH3, what is the mole ratio of hydrogen to nitrogen?
- A.
F. 1 : 1
- B.
G. 1 : 2
- C.
H. 3 : 1
- D.
J. 3 : 2
- 15.8. A student burns 1.50 mol C3H8 according to the following reaction: C3H8 + 5O2 → 3CO2 + 4H2O How many grams of carbon dioxide are produced?
- A.
A. 4.40 × 101 g
- B.
B. 6.61 × 101 g
- C.
C. 1.32 × 102 g
- D.
D. 1.98 × 102 g
- 16.9. A three (3.00) mole sample of K2S would have how many atoms of potassium?
- A.
F. 2.01 x 1023
- B.
G. 1.21 x 1024
- C.
H. 1.81 x 1024
- D.
J. 3.62 x 1024
- 17.11. What is the percent of hydrogen in methane, CH4?
- A.
F. 16.0
- B.
G. 25.1
- C.
H. 74.9
- D.
J. 100.0
- 18.12. Which of the following is the mass in grams of 4.25 × 10³ mol of N2?
- A.
A. 2.35 × 10-4 g
- B.
B. 1.52 × 102 g
- C.
C. 5.95× 104 g
- D.
D. 1.19 × 105 g
- 19.13. What is the new pressure of 150 mL of a gas that is compressed to 50 mL when the original pressure was 3.0 atm and the temperature is held constant?
- A.
F. 100 atm
- B.
G. 0.90 atm
- C.
H. 1.0 atm
- D.
J. 9.0 atm
- 20.13. What is the new pressure of 150 mL of a gas that is compressed to 50 mL when the original pressure was 3.0 atm and the temperature is held constant?
- A.
F. 100 atm
- B.
G. 0.90 atm
- C.
H. 1.0 atm
- D.
J. 9.0 atm
- 21.14. If the temperature of a gas changes, but the number of moles and volume remain constant, which of the following values must also change?
- A.
A. density
- B.
B. pressure
- C.
C. number of atoms
- D.
D. mass
- 22.15. A sample of a gas in a rigid container at 30.0°C and 2.00 atm has its temperature increased to 40.0°C. What will be the new pressure?
- A.
F. 1.03 atm
- B.
G. 1.94 atm
- C.
H. 2.07 atm
- D.
J. 6.04 atm
- 23.12. Calculate the approximate volume of a 1.50 mol sample of gas at 15.0oC and a pressure of 3.75 atm.
- A.
A. 1.73 L
- B.
B. 5.93 L
- C.
C. 8.65 L
- D.
D. 9.46 L
- 24.13. The volume of a gas is 50.0 mL at 20.0 K. What will be the new temperature if the gas is compressed to 10.0 mL under constant pressure?
- A.
F. 2.50 K
- B.
G. 3.00 K
- C.
H. 4.00 K
- D.
J. 5.00 K
Questions: 10 | Attempts: 48646 | Last updated: Aug 26, 2021
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Sample QuestionAll matter consists of particles called________________.
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Sample QuestionThe substances that enter a chemical reaction are called __________.
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