Vitamin C is known to contain 5.16×`10^24` hydrogen atoms. Calculate the number of moles of hydrogen atoms.

Explanation

To calculate the number of moles of hydrogen atoms in Vitamin C, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Given Data:**
- Number of hydrogen atoms = \( 5.16 \times 10^{24} \)
- Avogadro's number \( (N_A) \) = \( 6.02 \times 10^{23} \) atoms/mole

2. **Use the Formula for Moles:**
The number of moles (\( n \)) can be calculated using the formula:
\[ n = \frac{\text{Number of atoms}}{N_A} \]

3. **Substitute the Values:**
Substitute the given values into the formula:
\[ n = \frac{5.16 \times 10^{24}}{6.02 \times 10^{23}} \]

4. **Perform the Calculation:**
- First, divide \( 5.16 \) by \( 6.02 \):
\[ \frac{5.16}{6.02} \approx 0.857 \]
- Now, divide the powers of ten:
\[ \frac{10^{24}}{10^{23}} = 10^{1} = 10 \]
- Combine the results:
\[ n \approx 0.857 \times 10 = 8.57 \]

5. **Final Result:**
The number of moles of hydrogen atoms is approximately:
\[ n \approx 8.57 \text{ moles} \]

### Final Answer:
The number of moles of hydrogen atoms in Vitamin C is **8.57 moles**.