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# How do you calculate molar volume of nitrogen gas?

Molar volume is the volume of the gas under the conditions T=273K, P=1.0 atm (101.3 kPa). These conditions are known as STP (standard temperature and pressure)

You can use the equation: PV = nRT. If you isolate the variable "V" (by dividing both sides by "P"), you will be left with:

V= nRT/P -- where R is the universal gas constant (8.31 J/K/mol).

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 mol (0.0821 (atm L))/(mol K) 273 K)/(1 atm)##

V = 22.41 L of gas @ STP This is also known as Avogadro's number for @ STP

I hope this was helpful. SMARTERTEACHER