Verified answer

70 g/mol

Explanation:

Given: P₁ = 2 bar, P₂ = 5 bar, M = ? Molecualr weight of dinitrogen = 28

we know that,

Density (d) = MP/RT

P₁ = RTd/M

2 = RTd/M

P₂ = RTd/M

5 = RTd/M

Divide P₂ by P₁

5/2 = M/28

M = 5 × 28/2

   = 70 g/mol

Molecular wight of the gas will be 70 g/mol.

Answer:

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