Question

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

Answer 1

0.009709 moles

Explanations:

According to Avogadro's constant;

`1mole\text{ of a substance}=6.02*10^(23)molecule`

Given the following parameters

`\begin{gathered} mole\text{ of Copper}=(6.02*10^(21))/(6.2*10^(23)) \\ mole\text{ of Copper}=0.9709*10^(21-23) \\ mole\text{ of Copper}=0.9709*10^(-2) \\ mole\text{ of Copper}=0.009709moles \end{gathered}`

Hence the required moles of copper is 0.009709 moles