Question

2H2O → 2H2 + O2

Describe the mass of the reactants and products given the balanced chemical reaction.

A) The mass of the products is
2
3
that of the reactants.

B) The mass of the reactants equals the mass of the products.

C) The mass of the reactants is less than the mass of the products.

D) The mass of the reactants is greater than the mass of the products.

Answer 1

B) The mass of the reactants equals the mass of the products

Answer 2

Option (B) is correct.

The mass of the reactants equals the mass of the products.

Explanation:

According to law of conservation of mass :

In a balanced chemical equation, the mass of reactants is always equal to the mass of products.

Here, Water
`2H_(2)O` is the reactant which has 4 units of Hydrogen and 2 units of oxygen.

and
`2H_2+O_2` are products which also has 4 units 4 units of Hydrogen and 2 units of oxygen.

Thus, The mass of the reactants equals the mass of the products.

Thus, option (B) is correct.