Question

How many moles of H2O moles of H2O are needed to produce 55.7 moles of H2?

Answer 1

Answer: 55.7 moles of $H_2O$ are needed to produce the given amount of $H_2$

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ ......(1)

Given values:

Moles of $H_2$ = 55.7 moles

The chemical equation for the decomposition of water follows:

$2H_2O\rightarrow 2H_2+O_2$

By the stoichiometry of the reaction:

If 2 moles of hydrogen gas is produced from 2 moles of water

So, 55.7 moles of hydrogen gas will be produced by = $\frac{2}{2}\times 55.7=55.7mol$ of water

Hence, 55.7 moles of $H_2O$ are needed to produce the given amount of $H_2$