Pre-Test Chapter 11 Gas Laws
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Gas Law Pre-Test NAME ____________________
1.A sample of chlorine gas at 543 torr has a volume of 21.6 liters. If the temperature of the chlorine is 0 °c, how many moles of chlorine gas are present?
2. Poisonous carbon monoxide gas is a product of the internal combustion engine. If 1.2 mole of CO at 11 °C and 105 KPa are present in a container, what will be the volume of the CO gas?
3. How many grams will 25.0 liters of CH4 at 125 c and 80.5KPa. weigh?
4. Carbon dioxide is produced during the combustion of liquid propane fuel.
C3H8 + 5O2 ---> 3CO2 + 4H2O
If 5.0 kg of propane are burned at 1.00 atm. and 400 c , how many liters of CO2 will be produced?
5. 25.0 grams of Zn react with excess HCl. How many liters of H2will be produced at 25° c and 115.0 kPa ?
Zn + 2HCl ----> ZnCl2 + H2
6. How many liters of H2 will be produced at 20 °c and 580 torr if 4.0 grams of Al react with excess NaOH and H2O ? Given: 2Al + 2NaOH + 6H2O ----> 2NaAl(OH)4 + 3H2
7. 250ml of chlorine gas at 20 °c and 155kPa reacts with excess potassium metal. How many grams of potassium chloride will be produced ?
8. How many liters of NH3 at 25 °c and 785 torr will be produced by the reaction of 20.0 liters of N2 at 25 °c and 785 torr with excess H2 ?
9. How many liters of O2 are needed to burn 8.0 liters of methane gas
CH4 + 2 O2---> CO2+ 2H2O
10. How many grams of sodium metal must be reacted with excess water to produce 5.0 liters of H2 at 25 c and 125.5kPa?
11. A tank holds 15 L of Cl2 at 50 °C and 245kPa. What volume will the Cl2 occupy at STP?
12. O2 is collected over water at 20° C. The total gas pressure is found to be 752 torr. What is the O2pressure?
13. If the O2volume in #12 was 25 ml, what volume of O2 is there at STP?
14. In the lab a 250 ml flask of gas at 24 C and 600 torr has a mass of 0.85 g. What is the STP density of the gas?
15. Calculate the rate of effusion of Cl2 to N2.