Question

1g of a carbonate (M₂CO₃) on treatment with excess HCl produces 0.01 mol of CO₂ .The molar mass of M₂CO₃ is g mol^-1. (Nearest integer)

Answer 1

Correct answer is 100

From principle of atomic conservation of carbon atom,

Mole of M₂CO₃ x 1 = Mole of CO₂ × 1

1gm / molar mass of M₂CO₃ = 0.01 × 1

∴ Molar mass of M₂CO₃ = 100 gm/mole