So, given the reaction:
We want to find the number of atoms of H2 formed if 5 moles of H2 are produced.
Remember that 1 mol of any compound is defined as the Avogadro's number:
So, we could write:
[tex]5\text{molesH}2\cdot\frac{6.022\cdot10^{23}atomsH2}{1\text{ mol H2}}=3.011\cdot10^{24}atomsH2[/tex]
Therefore, that's the answer.
