I need help answering these chemistry questions?

Posted on 2015-10-30 06:57:00 in Chemistry by MAXEL

1: A sample of oxygen occupies 40.0 ? under pressure of 405 KPa. At what pressure will it occupy 24.3 L?

2: What is the volume of a gas at 253 K if the gas occupies 70.0 mL at a temperature of 473K?

3: A sample of helium has a volume of 495 mL at 273 K and 101.3 KPa. What is its volume at 35 degrees C and a pressure of 125 KPa?

4: What is the pressure of a gas at 353 K if the gas occupies 150.0 atm at a temperature of 453 K?

5: How many moles of sulfur gas must be in a 15.0 L container to exert a pressure of 180 KPa at a temperature of 300 K?

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