Question

Carbonic acid, H₂CO₃, is unstable and rapidly decomposes to water and carbon dioxide. Write a balanced molecular chemical equation to describe the reaction. If 20.0 g of carbonic acid reacts completely, what mass of water forms?

Answer 1

$H_2CO_3 → CO_2 + H_2O$

Moles of $H_2CO_3= \frac{20} {62.03}=0.322moles$

Moles of water = 0.322

Mass of $H_2O=$ $0.322× 18.02=5.802grams$