# 0.675 moles of radon gas contains how many atoms?

Feb 5, 2016

$\approx 4.06 \cdot {10}^{23} \text{atoms Rn}$
The number of atoms in a mole of a element or compound is expressed by Avogadro's constant $\approx 6.022 \cdot {10}^{23}$. Using this value, we can compute for the number of Rn atoms...
$\left(0.675 \text{mol Rn") * (6.022 * 10^23 "atoms Rn")/(1 "mol Rn}\right)$
$\approx 4.06485 \cdot {10}^{23} \text{atoms Rn}$
$\approx 4.06 \cdot {10}^{23} \text{atoms Rn}$