JAMB - Chemistry (2024 - No. 11)
The empirical formula of an organic liquid hydrocarbon is XY. If the relative molar masses of X and Y are 72 and 6 respectively, it's vapour density is likely to be
33
66
39
78
Explanation
Empirical formula of organic liquid is XY
(Empirical formula) x n = 2 x Vapour density
(XY) = 2 V.D
(72 + 6) = 2 V.D
78 = 2 V.D
V.D = \(\frac{78}{2}\)
V.D = 39
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