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If the molecular weight of air is 28.9, what is the density of air at atmospheric...

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.

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Answer #1

Density of air ( where is mass of air, is volume of air)

Using ideal gas equation,   

Molecular weight of air

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