Answer:
The net charge on the piece of purple plastic = (- 1.317 × 10⁻¹²) C
Explanation:
Charge on one electron = q = - 1.6 × 10⁻¹⁹ C
Charge on n electrons = n×q
Charge on (8.23 × 10⁶) electrons = 8.23 × 10⁶ × (-1.6 × 10⁻¹⁹) = - 1.317 × 10⁻¹² C
And the piece of purple plastic has 8.23 × 10⁶ added to it relative to its neutral state.
At the neutral state, the net charge on the piece of purple plastic is 0 as there are equal amounts of positive and negative charges.
Therefore, the net charge on the piece of purple plastic after adding (8.23 × 10⁶) electrons is totally the charge on the newly added electrons, that is, (- 1.317 × 10⁻¹²) C
