Question

How many moles of magnesium atoms are there in 0.2g of the metal?

Answer 1

`"0.0082 moles"`.

Explanation:

One mole of magnesium atoms is `"24.31g"`.

That means that `"0.2g"` of magnesium is:

`0.2/24.31 = "0.0082 moles"`