Question

Fe2 O3 + 3 H2 ------------->2 Fe + 3 H2 O Calculate how many moles of iron can be made from16.5 grams of Fe2 O

Answer 1

Explanation:

Since there is already a balanced chemical equation. Convert grams of Fe2O3 given into moles by dividing 16.5 grams by the atomic mass of Fe2O3 16.5÷159.59=0.103 moles

Set the molar ratios of the reactant in question which is Fe2O3 to the product which is Fe.

1 :0.103

2 : X (the X is the unknown moles of Fe

cross multiplying will give X=0.206. therefore the number of moles of Fe is 0.206 however we want mass of Fe so multiply the number of moles by the atomic mass of Fe which is 55.845g/moles so

0.206x55.845= 11.5 grams of Fe produced