where does the universal gas constant, r, come from? use the ideal gas law to solve the froblems below. a. b. c. d. a sample of chlorine gas at 543 torr has a volume of 21.6 l. if the temperature of the chlorine is 0 0 c, how many moles of chlorine gas are present? poisonous carbon monoxide gas is a product of the internal combustion engine. if 1.2 mol of co at 11 oc and 102 mm hg are present in a container, what will be the volume of the co gas? 0.020 mol of a gas has a pressure of 0.62 atm at 26.4 0 c, and a volume of 0.79 l. if the temperature is lowered by 5.2 oc and the pressure is increased to 0.96 atm, what is the new volume? 0.45 mol of a gas has a pressure of 299 torr at 300. oc and a volume of 53.8 l. at the same temperature and pressure, the volume of the gas is decreased to 39.7 l. how many moles of gas are present after the volume has changed? which statements about dalton's law of partial pressures are eue and which are a. b. c. ) of a mixture of gases is independent of the sizes of thethe total pressure (ptotal gas particles. attractive forces between gas particles are important in determining ptotal. for ideal gases, ptotal depends solely on the total number of moles of gas, for any temperature and volume. assume that a sample of humid air contains only nitrogen gas, oxygen gas and water vapor. if the atmospheric pressure is 745 mm hg and the partial pressure of n2 is 566 mm hg and of oxygen is 140. mm hg, what is the partial pressure of water vapor in the air? a 7.5 l mixture of gases is produced by mixing 4.0 l of n2 at 450 torr, 3.5 l of 02 at 252 torr, and 0.21 l of c02 at 150 torr. if the temperature is held constant at 65 0 c, what is the total pressure of the mixture?