1. A mixture of 3 moles of argon and 7 moles of hydrogen has a total pressure of 1 atm. What is the partial pressure of argon?
Select one:
a. 0.7 atm
b. 319 mmHg
c. 866 mmHg
d. 591 mmHg
e. 0.3 atm
2. A sample of oxygen is collected over water at a total pressure of 790.7 mmHg at 19°C. The vapor pressure of water at 19°C is 16.5 mmHg. The partial pressure of the O2is
Select one:
a. 0.9305 atm.
b. 0.9349 atm.
c. 0.9088 atm.
d. 1.01 atm.
e. 0.8871 atm.
3. A small amount wet of hydrogen gas (H2) can be prepared by the reaction of zinc with excess hydrochloric acid and trapping the gas produced in an inverted tube initially filled with water. If the total pressure of the gas in the collection tube is 789.7 mmHg at 25°C, what is the partial pressure of the hydrogen? The vapor pressure of water is 23.8 mmHg.
Select one:
a. 766 mmHg
b. 753.5 mmHg
c. 729.7 mmHg
d. 31.51 mmHg
e. 47.60 mmHg
4. A vessel with a volume of 52.5 L contains 1.80 g of nitrogen gas, 0.703 g of hydrogen gas, and 69.9 g of argon gas. At 25°C, what is the pressure in the vessel?
Select one:
a. 63 atm
b. 256.2 atm
c. 1.73 atm
d. 1.01 atm
e. 0.87 atm
5. Calcium nitrate will react with ammonium chloride at slightly elevated temperatures, as represented in the equation below.
Ca(NO3)2(s) + 2NH4Cl(s) →2N2O(g) + CaCl2(s) + 4H2O(g)What is the maximum volume of N2O at STP that could be produced using a 4.30-mol sample of calcium nitrate with excess ammonium chloride?
Select one:
a. 193L
b. 152L
c. 1.31×10-2L
d. 76.2L
e. 22.4L
6.If 479.8 mL of nitrogen gas, measured at 528.4 mmHg and 19.7oC, reacts with excess iodine according to the following reaction, what mass of nitrogen triiodide is produced?
N2(g) + 3I2(s) →2NI3(s)
Select one:
a. 3.54 g
b. 4.99 g
c. 10.95 g
d. 9.98 g
e. 0.014 g
7.What is the total volume of gases produced at 646 K and 1.00 atm pressure when 220 g of ammonium nitrite undergoes the following decomposition reaction?
NH4NO2(s) →N2(g) + 2H2O(g)
Select one:
a. 90.8 L
b. 224 L
c. 293 L
d. 237 L
e. 547 L
8. What is the volume occupied by a mixture of 0.522 mol of N2 and 0.522 mol of O2 gases at 0.56 atm and 42.7°C?
Select one:
a. 48.3 L
b. 32.6 L
c. 2.20 L
d. 4.41 L
e. 16.3 L
9. What volume of ammonia gas, measured at 696 mmHg and 68.2oC, is required to produce 4.46 g of ammonium sulfate according to the following balanced chemical equation?
2NH3(g) + H2SO4(aq) →(NH4)2SO4(s)
Select one:
a. 0.81 L
b. 2.06 L
c. 0.965 L
d. 11.9 L
e. 3.06 L
10. Which of the following is a postulate of the kinetic molecular theory of gases?
Select one:
a. The gas molecules are in constant random motion.
b. At a constant temperature, each molecule has the same kinetic energy.
c. The collisions between molecules are inelastic.
d. The volumes of the molecules are not negligible compared with the volume of the container.
e. The gas molecules vibrating in fixed positions.