Question

Calculate the moles in 120g of So2 gas?

Answer 1

Answer:

The molecular formula of sulphur dioxide is SO2

Molar mass of SO2

=32.06+2×16=64.06 g

So, mass of 1 mole of SO

2

=64.06 g

no of moles in 120g of SO2=120÷64.06=1.87 moles

Answer 2

Given
Mass of SO2= 120g

Mass of one mole SO2 = 32+ 2(16) =64g

Number of moles = Mass of substance / Mass of one mole

Number of moles = 120/64

Number of moles = 1.875 moles