Question

When the following equation is balanced, the coefficient in front of HCl is: Ba(s) + HCl(aq)→BaCl2(aq) + H2(g)

Question 4 options:

6

1

3

2

Answer 1

The correct option is 2

Answer 2

Answer: 2

Step-by-step explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The balanced equation for the given reaction is:

`Ba(s)+2HCl(aq)\rightarrow BaCl_2+H_2(g)`

Thus the coefficient for
`HCl` is 2.