Chapter 12 Problem QUIZ

1. The volume of a gas is 250 mL at 340.0 kPa of pressure.  What will the volume be when the pressure is reduced to 50.0 kPa, assuming the temperature remains constant?

2. A balloon filled with helium has a volume of 30.0 L at a pressure of 100 kPa and a temperature of 15.0^o C.  What will the volume of the balloon be if the temperature is increased to 80.0^oC and the pressure remains constant?

3. A gas has a volume of 590 mL at a temperature of -55^oC.  What volume will the gas occupy at 30.0^o C?

4. A gas occupies a volume of 140 mL at 35^o C and 97 kPa.  What is the volume of the gas at conditions of STP?

5. A gas has a pressure of 710 kPa at 227^oC.  What will its pressure be at 27^oC if the volume does not change:

6. The gaseous product of a reaction is collected in a 25.0 L container at 27^o C.  The pressure in the container is 300.0 kPa and the gas has a mass of 96.0 grams.  What is the formula mass of the gas?

7. A mixture of gases at a total pressure of 95 kPa contains N₂, CO₂, and O₂.  The partial pressure of the CO₂ is 24 kPa and the partial pressure of the N₂ is 48 kPa.  What is the partial pressure of the O₂?

8. The separate of uraniou-235 from uranium-238 has been carried out using gaseous diffusion.  Calculate the relative rates of diffusion of gaseous UF₆ containing these isotopes.  The formula mass of UF₆ containing uranium-235 is 349 amu and the formula mass of UF₆ containing uranium-238 is 352 amu.