Iron and oxygen gas react in a combination reaction to form iron(III) oxide. How many moles...

Iron and oxygen gas react in a combination reaction to form iron(III) oxide. How many moles of iron are needed to make 5.0 moles of iron(III) oxide? Hint: Write and balance the chemical equation.

Multiple Choice

2.5 mol
10. mol
5.0 mol
1.0 mol
0.50 mol

Expert Solution

Ans.

The balanced combination reaction of iron and oxygen gas is as shown below:

According to the balanced chemical reaction, 4 moles of iron will react with 2 moles of oxygen gas to form 2 moles of Fe₂O₃

In other words, to make 2 moles of Fe₂O₃, 4 moles of Fe is required.

Therefore, 1 mole of Fe₂O₃ will require no. of mole of Fe given by

And, 5 mole of Fe₂O₃ will require no. of mol of Fe given by

Therefore, 10 moles of Fe is required to make 5 moles of Fe₂O₃.

queen_honey_blossom answered 2 years ago

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