Question

One mole of hydrocarbon contains 48g of carbon. If it's vapour density is 28, the hydrocarbon is
a. An alkane
b.An alkene
c.An alkyne
d.Aromatic

Answer 1

1mole=48g of carbon.

vapor density is 28

$Molecular mass = \text{2 vapor density.}$ = 14

n=48/14=3

n carbon=4

=C₄H₃ (d.Aromatic)