How many electrons taken together make one coulomb ?

Options

A. `6.25xx10^18` electrons
B. `3.25xx10^18` electrons
C. `2.25xx10^18` electrons
D. `4.25xx10^18` electrons

Answer

To determine how many electrons make up one coulomb, we can follow these steps:

### Step 1: Understand the charge of one electron
The charge of one electron is approximately \( 1.60 \times 10^{-19} \) coulombs.

### Step 2: Use the formula to find the number of electrons
To find the number of electrons (n) that make one coulomb, we can use the formula:
\[ n = \frac{Q}{e} \]
where:
- \( Q \) is the total charge (1 coulomb in this case),
- \( e \) is the charge of one electron (\( 1.60 \times 10^{-19} \) coulombs).

### Step 3: Substitute the values into the formula
Substituting the values into the formula, we get:
\[ n = \frac{1 \text{ coulomb}}{1.60 \times 10^{-19} \text{ coulombs/electron}} \]

### Step 4: Perform the calculation
Calculating the above expression:
\[ n = \frac{1}{1.60 \times 10^{-19}} \approx 6.25 \times 10^{18} \]

### Step 5: Conclusion
Thus, the number of electrons that make one coulomb is approximately \( 6.25 \times 10^{18} \) electrons.

### Final Answer:
**6.25 x 10^18 electrons make one coulomb.**

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