Air is a mixture of N2,O2,Ar,Co2,Ne,He,CH4,lessor amounts of the other gases and possibly substantial amount of H2O in vapor form.we consider only dry air.
the average molecular weight of dry air is 29.009 (mass fraction weighted average of the species listed above).one mole of air masses 29,009g. one mole contains avogadro's number (NA=6.02213667^23) of molecules or atomes.
the equation of state for air is the ideal gas law: PV = nRT
P Pa pressure
V m3 volume
n mol number of molecules or atoms
T °K temperature
R= 8.314510 Jmol^-1 °K^-1 the molar gas constant
consider the fundamental units of each term in the equation.what physical quantity is represented on each side of the equation?