Question

If 12 gm of carbon is burnt in the presence of 32 gm of oxygen, how much carbon dioxide will be formed? 

Answer 1

The law of conservation of mass states that mass can neither be created nor destroyed or mass of reactants is always equal to that of products. 

   C        +        O₂     → CO₂ 

Carbon + Oxygen → Carbon dioxide 

Mass of reactants = 12 + 32 = 44 g 

Mass of Product (CO₂) = 44 g 

(One mole of C reacts with 1 mole of oxygen to form 1 mole of CO₂)