Calculate the actual mass of:
one molecule of oxygen.

Explanation

To calculate the actual mass of one molecule of oxygen (O₂), we can follow these steps:

### Step 1: Determine the molecular mass of oxygen.
Oxygen (O) has an atomic mass of approximately 16 AMU (atomic mass units). Since one molecule of oxygen gas (O₂) consists of two oxygen atoms, we can calculate the molecular mass as follows:

\[ \text{Molecular mass of O₂} = 2 \times \text{Atomic mass of O} = 2 \times 16 \, \text{AMU} = 32 \, \text{grams/mol} \]
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