Question

In a chemical reaction, 300 grams of reactant A are combined with 100 grams of reactant B. Both A and
B react to completion. How much will the product weigh?

Answer 1

the product will weigh 400 grams.according to law of conservation of mass,the mass of reactants is equal to mass of product.

Answer 2

The product will weigh 400 grams.

• As per the law of conservation of mass, mass can neither be created nor destroyed. Following this, the mass on the reactants side and the mass on the products side shall remain constant.
• Thus, mass on the reactants side = 300 + 100
• Mass on reactants side = 400 grams.
• Therefore, the product formed on complete reaction will have a mass of 400 grams.