The number of electrons present in -1 C of charge is

Options

A. `6.25xx10^(18)`
B. `1.6xx10^(19)`
C. `6xx10^(19)`
D. `1.6xx10^(18)`

Explanation

To find the number of electrons present in -1 C of charge, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the relationship between charge and number of electrons**:
The total charge (q) can be expressed in terms of the number of electrons (n) and the charge of a single electron (e). The formula is:
\[ q = n \cdot e \]

2. **Rearrange the formula to find the number of electrons**:
To find the number of electrons (n), we can rearrange the formula:
\[ n = \frac{q}{e} \]

3. **Identify the values**:
- Given charge \( q = -1 \, \text{C} \) (the negative sign indicates that we are considering electrons).
- The charge of a single electron \( e = 1.6 \times 10^{-19} \, \text{C} \).

4. **Substitute the values into the formula**:
\[ n = \frac{-1 \, \text{C}}{-1.6 \times 10^{-19} \, \text{C}} \]

5. **Calculate the number of electrons**:
\[ n = \frac{1}{1.6 \times 10^{-19}} \approx 6.25 \times 10^{18} \]

6. **Conclusion**:
The number of electrons present in -1 C of charge is approximately:
\[ n \approx 6.25 \times 10^{18} \]

### Final Answer:
The number of electrons present in -1 C of charge is \( 6.25 \times 10^{18} \).

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