Question

The ratio of moles of atoms in 12 g of Mg and 16 g of Oxygen is equal to? ( Mg=24 u,

O=16 u)

a) 3:4

b) 4:3

c) 1:1​

Answer 1

Moles of Oxygen = 16/32 = 0.5 moles

Moles of Magnesium = 12/24 = 0.5 moles

So, required ratio is :

Mg : O = 0.5 : 0.5

=> Mg : O = 1 : 1

Hence ratio is 1 : 1.