In the following balanced chemical equation, what does the subscript number after oxygen in iron(III) oxide mean? 2 F e 2 O 3 + 3 C → 4 F e + 3 C O 2
Select one:

3 atoms of oxygen in iron (III) oxide

3 molecules of iron (III) oxide

3 molecules of oxygen in iron (III) oxide

3 atoms of iron (III) oxide

They are moving faster

The rules are different for multiplication and addition, but the least precise value always restricts the answer. first do the multiplication (as per standard order of operations): 24.6681 × 2.38 ≈ 58.7 since 2.38 has the fewest significant figures, it is considered the lease precise value then do the addition: 58.7 + 332.58 ≈ 391.3 since 58.7 has fewest figures right of decimal it is considered least precise. so final answer: 391.3 with four significant figures.