# What is the mass of 1 mol of an element?

Aug 28, 2017

It is the molar mass of the element.

#### Explanation:

The molar mass of an element is its atomic weight (relative atomic mass) on the periodic table in grams/mole, or g/mol.

For example, the atomic weight of oxygen (O) on the periodic table is $\text{15.999 u}$, and its molar mass is $\text{15.999 g/mol}$.

Aug 28, 2017

It is the atomic weight in grams for the metric system.

#### Explanation:

The "mass" of an element is based on a comparison to an accepted standard mass, and may also be subject to the averaging of variations in normal isotopes of an element.

The "mol" is simply a number of units as derived by Avogadro to be $6.022 \times {10}^{23}$ units/mol. Thus, each element will have a different mass for the same number of moles.