(i) Calculate the number of electrons which will together weigh one gram .
(ii) Calculate the mass and charge on one mole of electrons .

Explanation

Let's solve the question step by step.

### Part (i): Calculate the number of electrons which will together weigh one gram.

1. **Determine the mass of a single electron**:
The mass of an electron is given as:
\[
m_e = 9.11 \times 10^{-31} \text{ kg}
...