# What is the mass of 1 mol of atoms of P?

Nov 28, 2015

The mass of $1$ mole of phosphorus atoms is approximately $30$ $g$.

#### Explanation:

The mass of $1$ mole of phosphorus atoms can be expressed as grams per mol ($\frac{g}{m o l}$). This is also known as molar mass. If we check on the periodic table, the molar mass of phosphorus is about $30.97$ $\frac{g}{m o l}$.

To find the mass of $1$ mole of phosphorus atoms, we can use the formula:

$m = n M$

where:
m = hass (grams)
n = number of moles
M = molar mass

$m = n M$
m=($1$ mol)(30.97 $\frac{g}{m o l}$)
m=($1$ color(red)cancelcolor(black)(mol))(30.97 $\frac{g}{\textcolor{red}{\cancel{\textcolor{b l a c k}{m o l}}}}$)
m=(1)(30.97 $g$)
$m = 30.97$ $g$
$m = 30$ $g$

Note:
The final answer should always have the correct number of significant figures.

$\therefore$, the mass of $1$ mole of phosphorus atoms is approximately $30$ $g$.