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A sample of oxygen gas at a pressure of 0.918atm and a temperature of 22.5C, occupies a volume of 708mL. If the gas is allowed to expand at constant temperature until its pressure is 0.668 atm, the volume of the gas sample will be mL. A sample of argon gas at a pressure of 0.606atm and a temperature of 256C, occupies a volume of 540mL. If the gas is heated at constant pressure until its volume is 791mL, the temperature of the gas sample will be C