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A student observed after an experiment  that a gas sample of 250-mL  has a mass of 0.243 g at  a temperature of 28 degree Celsius and a pressure of 760 mm Hg. determine  the molar mass of the gas if R=0.0821 L atm / mol K?

Using a gas sample that initially has volume of 24.6 L at a pressure of 1.04 atm then determine what would the pressure be if the volume of this sample gas is decreased to 5.38 Litre also state that which law of gas is used in this process?

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