# How many grams of iron are in 21.6 g of iron(III) oxide?

##### 2 Answers

Approx.

#### Explanation:

But by the composition of the oxide, there are thus

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There are 15.1 g of iron in the sample.

#### Explanation:

**Step 1. Calculate the molar mass of #"Fe"_2"O"_3#**

This tells us that there are 111.68 g

**Step 2. Calculate the mass of #"Fe"#**

∴ In 21.6 g