Question

How many moles of zinch oxide can be produced from 275 of zinc?

Answer 1

`\large \boxed{\text{4.21 mol}}`

Step-by-step explanation:

We must do the conversions :

mass of Zn ⟶ moles of Zn ⟶ moles of ZnO

We will need a chemical equation with masses and molar masses, so, let's gather all the information in one place.

Mᵣ: 65.38

Zn + … ⟶ ZnO + …

m/g: 275

(a) Moles of Zn

`\text{Moles of Zn} = \text{275 g Zn}* \frac{\text{1 mol Zn}}{\text{65.38 g Zn}} = \text{4.206 mol Zn}`

(b) Moles of ZnO

The molar ratio is 1 mol ZnO:1 mol Zn

`\text{Moles of ZnO} =\text{4.206 mol Zn} * \frac{\text{1 mol ZnO}}{\text{1 mol Zn}} = \text{4.21 mol ZnO}\\\\\text{The reaction produces $\large \boxed{\textbf{4.21 mol}}$ of ZnO}`