Find the number of moles of sodium atoms in $6.9 imes 10^{-2} \mathrm{~kg}\left( ight.$ Atomic mass $\left.=23 \mathrm{~g} \mathrm{~mol}^{-1} ight)$

Question

Find the number of moles of sodium atoms in $6.9 	imes 10^{-2} \mathrm{~kg}\left(ight.$ Atomic mass $\left.=23 \mathrm{~g} \mathrm{~mol}^{-1}ight)$

Aicharya · Accepted Answer

Number of moles $\begin{aligned} & =\frac{	ext { Mass of a substance }}{	ext { Molar mass of the substance }} \ & =\frac{6.9 	imes 10^{-2} 	imes 1000 \mathrm{~g}}{23 \mathrm{~g} \mathrm{~mol}^{-1}}=3 \mathrm{moles} \end{aligned}$

Find the number of moles of sodium atoms in $6.9 \times 10^{-2} \mathrm{~kg}\left(\right.$ Atomic mass…

Solution