Question

Determine the number of oxygen molecules in 50.88 g of oxygen if the molar mass of

oxygen molecules is 32.00 g/mol

Answer 1

`\large \boxed{9.575 * 10^(23)\text{ molecules}}`

Step-by-step explanation:

1. Moles of oxygen

`\text{Moles of O}_(2) = \text{50.88 g O}_(2) * \frac{\text{1 mol O}_(2)}{\text{32.00 g O}_(2)} = \text{1.590 mol O}_(2)`

2. Molecules of oxygen

`\text{Molecules of O}_(2) = \text{1.590 mol O}_(2) * \frac{6.022 * 10^(23)\text{ molecules O}_(2)}{\text{1 mol O}_(2)} = \mathbf{9.575 * 10^(23)}\textbf{ molecules O}_(2)\\\\\text{There are $\large \boxed{\mathbf{9.575 * 10^(23)}\textbf{ molecules of O}_(2)}$ in 50.88 g of oxygen.}`