I need help With Chemistry 2). If 0.00100 moles of hydrogen gas at 155 C exert a pressure of 323 atm. What is the volume?

3). If 0.00100 moles of hydrogen gas at 155 C exert a pressure of 323 atm. What is the volume?

4. It is desired to obtain a volume of 1.00 dm3 of nitrogen at 100.C and 640 kPa. How many moles of nitrogen would be required?

5. Some oxygen is collected in a 0.250 dm3 container at 25.0C and 720. kPa. How many moles of oxygen is this