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All of the gas laws discussed so far had two variables in relationship with two variables constant. We can use some algebra to combine all of the gas laws together to make one equation.
R is the universal gas constant.
R = 0.0821 (L ᐧ atm) / (K ᐧ mol)
or
R = 8.314 (L ᐧ kPa) / (K ᐧ mol)
*the units used for P, V, n, and T must match the gas constant.
Additionally, the external conditions must be at standard temperature and pressure or STP (0° C and 1 atm).
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