Combined Gas Law

The experimental observations of the individual gas laws can be united in the combined gas law.

Combined Gas Law Example:  A scientist has a sample of gas that was collected several days earlier.  The sample has a volume of 392 cm3 at a pressure of 0.987atm and temperature of 21°C.  On the day the gas was collected the temperature was 13°C and pressure was 0.992 atm.  What volume did the gas have on the day it was collected?

Combined Gas Law Example:  2.00L of a gas is collected at 25°C and 745mmHg.  What is the volume at STP?

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