Question

The density of phosphine gas is 1.27g/D3 at 50C and 0.987*10^5 Pa. Calculate it's molar mass

Answer 1

Dear Student,

◆ Answer -

M = 34.55 g/mol

◆ Explaination -

Density of PH3 at 50 ℃ is given by -

d = W / V

d = M × n / V

d = M × P / RT

M = dRT / P

Substitute values,

M = 1.27 × 8.314 × 323 / 0.987×10^5

M = 0.03455 kg/mol

M = 34.55 g/mol

Therefore, molar mass of phosphine gas is 34.55 g/mol.

Hope this is useful...

Answer 2

Density of PH 3 at 50 ℃ is given by -

d = W / V

d = M × n / V

d = M × P / RT

M = dRT / P

Substitute values,

M = 1.27 × 8.314 × 323 / 0.987×10^5

M = 0.03455 kg/mole

M = 34.55 g/mole

Therefore, molar mass of phosphine gas is 34.55 g/ mole.