32.What units are normally used to express the density of gases?33.A sample of nitrogen gas kept in a container of volume 2.3 L and at a temperature of 32 C exerts a pressure of 4.7 atm. Calculate the number of moles of gas present.

34.Given that 6.9 moles of carbon monoxide gas are present in a container of volume 30.4 L, what is the pressure of the gas (in atm) if the temperature is 62 C?35.What volume will 5.6 moles of sulfur hexafluoride (SF6) gas occupy if the temperature and pressure of the gas are 128 C and 9.4 atm?36.A certain amount of gas at 25 C and at a pressure of 0.800 atm is contained in a glass vessel. Suppose that the vessel can withstand a pressure of 2.00 atm. How high can you raise the temperature of the gas without bursting the vessel?37.A gas-filled balloon having a volume of 2.50 L at 1.2 atm and 25 C is allowed to rise tothe stratosphere (about 30 km above the surface of Earth), where the temperature and pressure are -23C and 3.00 × 10-3atm, respectively. Calculate the final volume of the balloon.38.The temperature of 2.5 L of a gas initially at STP is raised to 250 C at constant volume.Calculate the final pressure of the gas in atm.39.The pressure of 6.0 L of an ideal gas in a flexible container is decreased to one-third of its original value, and its absolute temperature is decreased by one-half. What is the final volume of the gas?

40.A gas evolved during the fermentation of glucose (wine making) has a volume of 0.78 Lat 20.1C and 1.00 atm. What was the volume of this gas at the fermentation temperature of 36.5 C and 1.00 atm pressure?41.An ideal gas originally at 0.85 atm and 66 C was allowed to expand until its final volume, pressure, and temperature were 94 mL, 0.60 atm, and 45C, respectively. What was its initial volume?42.Calculate the volume (in liters) of 88.4 g of CO2at STP.43.A gas at 772 mmHg and 35.0 C occupies a volume of 6.85 L. Calculate its volume at STP.44.Dry ice is solid carbon dioxide. A 0.050-g sample of dry ice is placed in an evacuated 4.6-L vessel at 30 C. Calculate the pressure inside the vessel after all the dry ice has been converted to CO2gas.