SHOW WORK

9. An 925 mL sample of O, gas at 0.98 atm is compressed, at constant temperature, to 2.1 atm
What is the final volume of the gas?
10. We want to decrease the volume of a fixed amount of gas from 285.5 mL to 225.0 mL while holding the pressure constant. What temperature must we cool this gas to if it starts at 78.0 °C?
11. A 755.0 mL sample of He gas is at 835 torr and - 19 °C. What volume will the gas occupy und standard conditions?
12. At what temperature will a 231.0-gram CH (MM: 44) sample exert a pressure of 925 mm Hg when confined in a 7.0-liter container?
13. What volume would 182.0 grams of Nz (MM: 28) gas occupy at STP?