A piece of purple plastic is charged with 8.23 × 10 6 extra electrons compared to its neutral state. What is its net electric charge (including its sign) in coulombs? net electric charge:

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