Enter your Name:   Enter your E-mail Address:  01. State Charles' Law.. 02. Which of the following is not a pressure unit? atm, Pa, kPa, torr, pound, mmHg 03. Why is the Kelvin temperature scale called an absolute temperature scale? 04. Under which of the following conditions would you expect gases to behave ideally? a. T = 100 K, P = 3.4 atm b. T = 300 K,P = 0.9 atm c. T = 150 K, P = 1.0 atm d. T = 273 K, P = 50.5 atm 05. What is the true definition of boiling point? 06. An experiment is run in which hydrogen gas is collected in a vessel over water. The first experiment is run at a temperature of 90° Centigrade and the second is run at 15° Centigrade. Everything except the temperature is exactly the same in the two experiments. In which experiment will the mole fraction of the hydrogen in the vessel be the greatest? 07. What big mistake did Darwin make when he formulated his evolutionary theory? 08. A hot air balloon is filled with 1.89 x 102 liters of air at 21° C. If atmospheric pressure does not change, how hot must the air become in order to increase the volume to 4.5 x 102 liters? 09. A weather ballon is filled with 34.6 liters of helium at 24° C. and 1.02 atm. As the weather balloon rises, the surrounding temperature decreases, as does the pressure. When the balloon reaches an altitude where the temperature is 11 ° C. and the pressure is 0.21 atms, what will the volume of the balloon be? 10. The vapor pressure of water is 30.0 torr at 29° C. If a reaction at that emperature produces oxygen which is collected over water, what total pressure will have to be in the reaction vessel to ensure that the oxygen collected had a partial pressure of 567 torr? 11. The gas mixture for an acetylene torch should be about 12.0 grams of oxygen for every 100.0 of acetylene (C2H2). What is the mole fraction of each component in such a mixture? 12. What is the mole fraction of each component of a gas mixture that contains sulfur trioxide at a pressure of 1.45 atm and sufur dioxide at a pressure of 0.32 atms? 13. If 345.1 grams of CO2 are placed in a vessel whose volume is 32.1 liters at a temperature of 20° C., what will the pressure be? 14. Iron rusts according to the following reaction: 4Fe (s) + 3O2 (g) + 4H2O (1) -> 2Fe2O3(H2O)2 If 1.4 liters of oxygen were added to excess water and iron at a pressure of 0.97 atms and a temperature of 55° C., how many grams of iron would rust? 15. The bright light that comes from a flash bulb is due to a quick combustion of magnesium, according to the following reaction: 2Mg (s) + O2(g) -> 2MgO (s) If a flashbulb contains 1.3 g of Mg, what is the minimum pressure of O2 needed to burn up that magnesium? Assume the flashbulb has a volume of 10.0 mL and a temperature of 23° C.