Question

Calculate the volume of 320 g of SO₂ at stp. (Atomic mass : S = 32 and O = 16).

Answer 1

Gram molar mass of SO₂ = 32 + (2 x 16) = 6 g.

No. of moles in 320 g of SO₂ = 320/64 = 5 moles

At STP 1 mole of SO₂ occupies 22.4 dm³

5 moles of SO₂ will occupy 5 x 22.4 = 112 dm³