Question

An oxide of nitrogen contains 70% of oxygen
A )Determine its emperical formula

Answer 1

Hi,

Find the moles of each element

O = 70÷ 16 = 4.4

N= (100-70 )÷14=2.14

Mole ratio of each element

O= 4.4÷2.14= 2

N= 1

So, the empirical formla is

NO2

Hope the answer is helpful