Calculate :
The number of moles in 12g of oxygen gas. [O=16]

Explanation

To calculate the number of moles in 12 grams of oxygen gas (O₂), follow these steps:

### Step 1: Understand the formula for calculating moles
The formula to calculate the number of moles (n) is given by:
\[ n = \frac{\text{mass of substance (g)}}{\text{molar mass (g/mol)}} \]

### Step 2: Identify the mass of oxygen
From the question, the mass of oxygen gas given is:
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