William H. answered • 04/21/21
Retired NASA scientist
Use the Ideal gas law—
PV=nRT. P is pressure V is volume n is the number of moles of gas. R is the “gas constant” T is temperature in Kelvin degrees.
R can be expressed in variety of ways depending on the units needed
For this problem R is conveniently expressed as 0.08206 liter atmospheres per mole per degree
Kelvin degrees equal Celsius degrees plus 273. So -60 C is 213 K
Solving the equation for volume yields V=nRT/P
V= (2.9)x(.08206) x (213) / (.3) = 168.96
units should be. (moles) x (liter x atmospheres /moles/degrees) x (degrees) / (atmospheres)
All units cancel( ie they appear on the bottom and the top) except liters so the answer is 168.96 liters
You can look at gas constant on Wikipedia to get R expressed in different units. Pick the one that contains the units of the values you know and the units you want for your answer.
