Question

question 3

one mole of oxygen gas has a mass of ______ g.

none of these
16.0
8
(6.022 \times 10^{23})
32.0

Explanation:

⚡ Using what you learned: mole-to-mass and mole-to-particle conversions

Step 1: Identify the chemical formula of oxygen gas

Oxygen gas exists naturally as a diatomic molecule:

$$ \text{O}_2 $$

Step 2: Calculate the molar mass

Using the atomic mass of a single oxygen atom (\(\approx 16.0\text{ g/mol}\)):

$$ \text{Molar mass of } \text{O}_2 = 2 \times 16.0\text{ g/mol} = 32.0\text{ g/mol} $$

Step 3: Determine the mass of one mole

$$ 1\text{ mole} \times 32.0\text{ g/mol} = 32.0\text{ g} $$

Answer:

32.0