The ideal gas law is as follows:

At conditions of standard temperature and pressure (STP), temperature = **273.15 K** and pressure = **1 atm**.

We first need to determine the number of moles of O_{2} and N_{2}. The molar mass of O_{2} is 2(16.00 g/mol O) = **32.00 g/mol** and the molar mass of N_{2} is 2(14.01 g/mol N) = **28.02 g/mol**.

A gas sample at STP contains 1.26 g oxygen and 1.76 g nitrogen.

What is the volume of the gas sample?

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