Ideal gas and molar mass?

how is the ideal law related to the molar mass of a gas?

Answer:
Ideal gas equation,

PV=nRT

which,
P=pressure
V=volume
n=number of mol
R=universal gas constant=8.314 J/Kmol @ 0.0821 L/atm
T= temperature in Kelvin
so if we know the mass of the sample, we can calculate its molar mass and the sample must be pure.

mass of the sample(g) = n x molar mass(g/mol)
the ideal gas law can be written as

PV= mRT/M

where P is pressure (Pa)
V is volume (m^3)
m is mass of gas (kg)
R is the gas constant= 8.314J/mol/K
T is temperature (K)
M is the molar mass (kg/kmol)

Hope this helps
nRT=PV , n=m/M so: (m/M)RT=PV
GOOD LUCK!

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