Question

Сколько атомов содержится в 3,2 г кислорода O2?

Answer 1

В 3,2г О2 содержится : 6.02e+22 атомов

Answer 2

Calculating the Number of Oxygen Atoms in 3.2g of O2

To calculate the number of oxygen atoms in 3.2g of O2, we can use the following steps:

1. Determine the Molar Mass of O2: - The molar mass of O2 (oxygen gas) is 32 g/mol.

2. Calculate the Number of Moles of O2: - We can use the formula: \[ \text{moles} = \frac{\text{mass}}{\text{molar mass}} \] Substituting the given mass of 3.2g and the molar mass of O2, we get: \[ \text{moles} = \frac{3.2g}{32g/mol} = 0.1mol \]

3. Use Avogadro's Number to Find the Number of Oxygen Atoms: - Avogadro's number is \(6.022 \times 10^{23}\) atoms/mol. - Multiplying the number of moles by Avogadro's number gives us the number of oxygen atoms: \[ \text{Number of atoms} = \text{moles} \times 6.022 \times 10^{23} \] Substituting the calculated moles, we get: \[ \text{Number of atoms} = 0.1mol \times 6.022 \times 10^{23} = 6.022 \times 10^{22} \text{ atoms} \]

Therefore, there are approximately 6.022 x 10^22 atoms in 3.2g of O2.