1. How many moles of gas occupy 98 L at a pressure of 2.8 atmospheres and a temperature of 292 K?
2. If 5.0 moles of O2 and 3.0 moles of N2 are placed in a 30.0 L tank at a temperature of 25 C, what will the pressure of the resulting mixture of gases be?
3. A balloon is filled with 35.0 L of helium in the morning when the temperature is 20.0 C. By noon the temperature has risen to 45.0C. What is the new volume of the balloon?