Question

When the equation H2S + HNO3 → S + NO + H2O is balanced, what is the coefficient for H2O?

Question options:

4

6

3(incorrect)

2

Answer 1

Answer : The correct option is, 4

Explanation :

Balanced chemical reaction : In the balanced chemical reaction the number of individual atoms present of reactant side must be equal to the product side.

The given balanced reaction will be,

`3H_2S+2HNO_3\rightarrow 3S+2NO+4H_2O`

By stoichiometry we can say that, 3 moles of hydrogen sulfide react with 2 moles of nitric acid to give 3 moles of sulfur, 2 moles of nitrogen oxide and 4 moles of water as products.

The coefficient for
`H_2O` is, 4

Therefore, the correct option is, 4

Answer 2

The coefficient for H2O is 4

Step-by-step explanation

Coefficient is thew number in front of the formula in a balanced chemical equation.

The balanced equation as below

3H₂S + 2HNO₃ → 3S + 2 NO +4H₂O

The number in front of H₂O is 4 therefore 4 is the coefficient for H₂O