Senyawa 45 G. Senyawa organik X

massa X = 45 gr
massa air = 135 gr
Mr air = 18
P° = 720 mmHg
P = 675 mmHg
Mr X = ?

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P = X air . P°
675 = X air . 720
X air = 0,9375

mol air = massa / Mr = 135 gr / 18 = 7,5 mol

X air = mol air / (mol air + mol X)
0,9375 = 7,5 / (7,5 + mol X)
7,03125 + 0,9375mol X = 7,5
mol X = 0,5

X = massa / mol
X = 45 gr / 0,5
X = 90