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