What is the volume of 1.2 moles of oxygen gas (O2) at standard temperature and pressure (STP)?

Question

anonymous · Answer

@abb0t is it 27 L?

aaronq · Answer

at STP, 1 mole of (any) gas occupies 22.414 L.

rina.r · Answer

If you know the density of oxygen and the molar mass of oxygen you can divide the two in order to find the molar volume of oxygen. (L/mol) Oxygen has a density of 1.429 g/L and a molar mass of 32.00 g/mol. (Just remember that the molar mass of oxygen, chemical formula of 0 2, comes straight from the periodic table.) So, divide: 1.429 g/L / 32.00 g/mol = 22.393 L/mol. The "g" unit cancellsout and you're left with L/mol which is your molar mass. Compare that with 22.4 L/mol which is the accepted molar volume for an ideal gas, derived from the ideal gas law: pv=nRt. However, because most gases do not behave ideally there is a slight discrepancy. http://wiki.answers.com/Q/What_is_molar_volume_of_oxygen_at_Standard_Temperature_and_Pressure#slide5