The molar mass of `O_(2)` is 32 g per mole. What is the number of moles in 16 g of oxygen?

Options

A. 3.2
B. 0.5
C. 0.3125
D. 0.42

Answer

To find the number of moles of oxygen in 16 g, we can use the formula:

\[ \text{Number of moles} = \frac{\text{Mass of substance (g)}}{\text{Molar mass (g/mol)}} \]

**Step 1: Identify the given values.**
- Mass of oxygen = 16 g
- Molar mass of \( O_2 \) = 32 g/mol

**Step 2: Use the formula to calculate the number of moles.**
\[ \text{Number of moles} = \frac{16 \text{ g}}{32 \text{ g/mol}} \]

**Step 3: Perform the calculation.**
\[ \text{Number of moles} = \frac{16}{32} = 0.5 \text{ moles} \]

**Final Answer:**
The number of moles in 16 g of oxygen is **0.5 moles**.

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