Question

How many moles of Na are required to make 2.4 moles Fe?
_Na + _Fe(2)O(3) - _Na(2)0 + _Fe

Answer 1

Answer: 7.2 moles of Na are required to make 2.4 moles of Fe.

Explanation:

The balanced  chemical equation is:

$6Na+Fe_2O_3\rightarrow 3Na_2O+2Fe$

According to stoichiometry:

2 moles of Fe are produced from = 6 moles of Na

Thus 2.4 moles of Fe are produced from = $\frac{6}{2}\times 2.4=7.2$ moles of Na.

Thus 7.2 moles of Na are required to make 2.4 moles of Fe.