Question

The density of air is 0.001293 g/ml . Its vapour density is:

• A. 143
• B. 14.48
• C. 1.43
• D. 0.143

Answer 1

Answer: (B)

14.48

Molecular mass = $2\times VapourDensity$

Given , $Density=0.001293g/ml$

$1ml$ has $0.001293$ gm

$22.4\times {10}^{3}ml$ has $0.001293\times 22.4\times {10}^3$

= 28.96

Vapour density = $\frac{28.6}{2}$= $14.48$