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# How do you calculate molar volume of a gas at STP?

Using the , you would find the volume of 1 mole of a gas at Standard Temperature and Pressure (STP).

STP = 1 atm of pressure and 273 K for temperature

P = 1 atm V = ??? n = 1 mole R = 0.0821 atm L/mol K K = 273 K

##P V = n R T ## solves to ##V = (n R T) / P##

##V = (1 cancel(mol) (0.0821 (cancel(atm)L))/(cancel(mol) cancelK) 273cancelK)/(1cancel(atm))##

V = 22.41 L of gas @ STP

I hope this was helpful. SMARTERTEACHER