If the molecular weight of air is 28.9, what is the density of air at atmospheric pressure and a temperature of 368.7 K? 1 atm = 1.013×105 N/m2, the mass of a proton is 1.67262 × 10?27 kg , Avogadro’s number is 6.02214 × 1023 mol?1 and k = 1.38065 × 10?23 N · m/K . Answer in units of kg/m3.
Density of air ( where is mass of air, is volume of air)
Using ideal gas equation,
Molecular weight of air
, , and
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