# What is the mass of .1 mole of magnesium atoms?

Jun 26, 2017

$2.43$ $\text{g}$

#### Explanation:

We're asked to find the mass of $0.1$ $\text{mol Mg}$.

To solve this, along with any mass-to-mole conversion, we need to know the molar mass of the substance.

On most periodic tables, for each element there is a mass number under the element's symbol. This is the mass of one mole of that element, called its molar mass. For magnesium, this is color(red)(24.30 color(red)("g/mol".

Using dimensional analysis, we can convert the given mole number ($0.1$ $\text{mol}$) to grams:

0.1cancel("mol Mg")((color(red)(24.30)color(white)(l)color(red)("g Mg"))/(1cancel("mol Mg"))) = color(blue)(2.43 color(blue)("g Mg"

Thus, $0.1$ mole of magnesium atoms has a mass of color(blue)(2.43 sfcolor(blue)("grams"..