Question

A gas with an empirical formula NO2 has a molecular weight of 92.0g/mol. A possible molecular formula for the gas is

a) NO2
b) N2O3
c) N3O6
d) N2O5
e) N2O4

Answer 1

Answer: -

N₂O₄

Explanation: -

Emperical formula = NO2

Emperical formula mass = 14 x 1 + 16 x 2 =46 g /mol

Molecular weight = 92.0 g/mol

n =
`(Molecular weight)/(Emperical Formula Weight)`

=
`(92.0 g/ mol)/(46 g/ mol)`

= 2

Molecular formula = (Emperical formula)n

= (NO₂)₂

= N₂O₄