Question

How many moles of zinc, Zn, are in 1.31×10^24 Zn atoms?

Answer 1

The number of moles of Zn is 2.11 moles

Step-by-step explanation

Given that;

`\text{ The number of zinc atoms is 1.31 }*\text{ 10}^{24\text{ }}atoms`

Follow the steps below to find the number of moles of Zn

`\text{ mole = }\frac{\text{ number of atoms }}{\text{ Avogadro's number}}`

Recall, that the Avogadro's number is 6.02 x 10^23

`\begin{gathered} \text{ mole = }\frac{\text{ 1.31}*10^(24)}{6.02\text{ }*\text{ 10}^(23)} \\ \\ \text{ mole = }\frac{1.31}{\text{ 6.02}}*\text{ 10}^{24\text{ - 23}} \\ \\ \text{ mole = 0.211 }**10^1 \\ \text{ mole = 2.11 moles} \end{gathered}`

Therefore, the number of moles of Zn is 2.11 moles