Question

If 10 moles of Fe react according to the chemical equation below how many moles of H2 would you expect to produce 2Fe + 3 H2SO4 = Fe2(SO4)3 + 3H2

Answer 1

1) Write the chemical equation.

`2Fe+3H_2SO_4\rightarrow Fe_2(SO_4)_3+3H_2`

2) Moles of H2 produced from Fe.

The molar ratio between Fe and H2 is 2 mol Fe: 3 mol H2.

10 mol Fe.

`mol\text{ }H_2=10\text{ }mol\text{ }Fe*\frac{3\text{ }mol\text{ }H_2}{2\text{ }mol\text{ }Fe}=15\text{ }mol\text{ }H_2`

15 mol H2 is expected to be produced.