Question

How many grams of Fe are needed to create 32.5mol Fe3O4?

Answer 1

Answer:

5444.89 grams of Fe

Explanation:

1) We need the chemical equation for Fe3O4 to find the mole ratio for Fe to Fe3O4. Chemical equation:

3Fe+4H2O → Fe3O4+4H2

The mole ratio of Fe to Fe3O4 is 3:1

2) Now, we find how many grams of Fe are needed to produce 32.5 moles of Fe3O4.

$32.5 moles Fe3O4$$x \frac{4 mole O}{1 mole Fe3O4}$ = 97.5 moles Fe needed to produce 32.5 moles of Fe3O4

3) Convert 97.5 moles of Fe into grams. The molar mass of Fe is 55.845g.

$97.5 mole Fe$$x\frac{55.845g Fe}{1 mole Fe}$ = 5444.8875g or 5444.89g.