| 1. The air pressure of the typical inner tube on a road bike used in racing is inflated to a pressure of 115 psi. Which of the following would be this pressure in atm?
a. 0.151 atm
b. 7.83 atm
c. 1690 atm
d. 32.6 atm
e. 115 atm
2. When 0.125 L of an ideal gas at 300°C undergoes a change in volume to 200 mL at constant pressure, which of the following is the new temperature of the gas?
a. 300°C
b. 644°C
c. 480°C
d. -14.9°C
e. 188°C
3. Ten liters of CO2 at 0°C and 850 torr has its temperature changed to 87°C while the volume remains constant? The new pressure will be which of the following?
a. 1.47 atm
b. 2.32 atm
c. 33.89 atm
d. 1120 atm
e. cannot be determined
4. 0.562 mol of hydrogen gas (H2) at 98°C and 1147 torr would be contained in which of the following volumes?
a. 11.33 L
b. 22.40 L
c. 0.81 L
d. 5.27 L
e. cannot be determined
5. The number of atm in 100 psi would be which of the following?
a. 1.47 atm
b. 8.26 atm
c. 6.80 atm
d. 5.35 atm
e. cannot be determined
6. If a large amount of iron filings (>50 g) were sealed into a 1.0 L container with moist air and the iron was allowed to react to form various iron oxides, by what approximate percent would the volume of the container decrease if the pressure and the temperature remained unchanged?
a. 10%
b. 20%
c. 40%
d. 60%
e. 80%
7. How many liters of oxygen gas at STP are required to react completely with 14.6 grams of solid sodium metal to form sodium oxide?
a. 7.12 L
b. 11.2 L
c. 3.56 L
d. 13.65 L
e. none of the above
8. What volume will 0.23 moles of nitrogen gas occupy at STP?
a. 0.01 L
b. 3.85 L
c. 5.15 L
d. 4.19 L
e. none of the above
9. If in an internal combustion engine we assume that one cylinder has a volume of 200 mL when the gas air mixture is compressed in the cylinder, which of the following would be a good estimate of the pressure inside the cylinder after ignition, if we assume that the starting temperature and pressure are at STP and the ending temperature is at 2500°C?
a. 1.11 atm
b. 3.19 atm
c. 6.77 atm
d. 8.52 atm
e. 10.16 atm
10. At what pressure would 0.30 mole of argon gas at 23.0°C occupy 8.90 L?
a. 0.819 atm
b. 8.2 atm
c. 0.064 atm
d. 14.58 atm
e. none of the above
11. A device used to measure atmospheric pressure would be which of the following?
a. a barometer
b. a mannometer
c. a torremeter
d. a pascalometer
e. none of the above
12. How many liters of N2 gas at STP can be produced by the reaction of 1.22 kg of lead azide, Pb(N3)2 given the following reaction:Pb(N3)2 --> Pb + 3 N2
a. 93.8 L
b. 281 L
c. 8.23 L
d. 31.3 L
e. 162 L
13. A container with two gases, N2 and O2, is 40.0% by volume N2. Calculate the partial pressure of O2 if the total pressure inside the container is 5.00 atm.
a. 1.00 atm
b. 2.00 atm
c. 3.00 atm
d. 4.00 atm
e. c
14. Two moles of gas A spontaneously convert to three moles of products in a container where the temperature and pressure are held constant. The sample of gas A originally took up 10.2 L. Which of the following is the new volume of the products?
a. 0.189 L
b. 6.73 L
c. 12.3 L
d. 1.15 L
e. 15.3 L
15. What volume would 32.2 g of NO2 gas occupy at 3.12 atm and 78.0°C?
a. 1.56 L
b. 0.64 L
c. 2.74 L
d. 6.46 L
e. none of the above
16. A 3.05 g sample of NH4NO3 is introduced into an evacuated flask with a volume of 2.18 L and then is heated to a temperature of 250°C. What is the total pressure in the flask when the ammonium nitrate has been completely decomposed to ammonia NH3 and water?
a. 8.55 atm
b. 68.32 atm
c. 26.57 atm
d. 2.25 atm
e. 0.3 atm
17. Solid potassium chlorate (KClO3) decomposes to produce solid potassium chloride (KCl) and oxygen gas (O2) according to the following unbalanced equation:KClO3 --> KCl + O2 What volume of oxygen gas, measured at 40°C and 85.4 kPa, will be produced when 13.5 grams of potassium chlorate is decomposed
a. 2.32 atm
b. 302.4 atm
c. 48.9 atm
d. 0.22 atm
e. 4.59 atm
18. An 8.78 g sample of helium gas has a volume of 5.20 L at a pressure of 2052 torr. Which of the following would the temperature of this gas?
a. 4.87 K
b. 78.1 K
c. 46.3 K
d. 275 K
e. 129 K
19. A sample of 250 grams of gaseous sulfur dioxide at 32°C and in a volume of 1.83 L is decomposed. What is the resulting pressure at the end of the reaction assuming no change in temperature or volume?
a. 26.74 atm
b. 37.28 atm
c. 53.47 atm
d. 84.79 atm
e. none of the above
20. Which of the following is the amount of nitrogen gas produced at STP from the decomposition of 1.220 kg of lead (II) azide ( Pb(N3)2 ) into lead and nitrogen gas?
a. 93.82 L
b. 281.5 L
c. 8.234 L
d. 31.31 L
e. 162.8 L
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