Question

Calculate the number of moles of Cu in 6.2×1021 atoms of Cu.

Answer 1

Answer:

0.009709 moles

Explanations:

According to Avogadro's constant;

$1mole\text{ of a substance}=6.02\times10^{23}molecule$

Given the following parameters

$\begin{gathered} mole\text{ of Copper}=\frac{6.02\times10^{21}}{6.2\times10^{23}} \\ mole\text{ of Copper}=0.9709\times10^{21-23} \\ mole\text{ of Copper}=0.9709\times10^{-2} \\ mole\text{ of Copper}=0.009709moles \end{gathered}$

Hence the required moles of copper is 0.009709 moles