# The chemical formula of ilmenite is #FeTiO_3#. What mass of titanium can be obtained from 500.0 g of ilmenite?

##### 1 Answer

#### Explanation:

Your strategy here will be to determine how many grams of titanium, **one mole** of ilmenite by using the **molar masses** of ilmenite and of titanium.

Ilmenite's **molar mass** is equal to **every mole** of ilmenite will have a mass of

As you can see by inspecting the compound's chemical formula, **one mole** of ilmenite will also contain

,one moleof iron#1 xx "Fe"# ,one moleof titanium#1 xx "Ti"# ,three molesof oxygen#3 xx "O"#

Since titanium has a **molar mass** of

So, if you get **for every**

#500.0 color(red)(cancel(color(black)("g ilmenite"))) * "47.857 g Ti"/(151.71 color(red)(cancel(color(black)("g ilmenite")))) = color(green)(|bar(ul(color(white)(a/a)"157.7 g Ti"color(white)(a/a)|)))#

The answer is rounded to four **sig figs**.

Notice that it's more *practical* to determine the **percent composition** of the compound because it makes the ratio of titanium to ilmenite easier to work with.

#"% Ti" = (47.857 color(red)(cancel(color(black)("g"))))/(151.71color(red)(cancel(color(black)("g")))) xx 100 = 31.545%#

This means that you get **for every**