How many moles of gas are in a volume of 43.5 L at STP? Please show work

Answer 1

When you are at STP (standard temperature and pressure), you don't need to use the ideal gas law if you remember that 1 mole of any ideal gas = 22.4 liters.

43.5 L x 1 mole/22.4 L = 1.94 moles of gas

Answer 2

Assume ideal gas law applies to this question...

PV = nRT, where P= 1.0 atm, T = 0^°C = ?? Kelvin (STP), n= 1.0 mol, you may calculate what the molar volume of ANY GAS is in liter/mol; then you may use this molar volume as a conversion factor.