Apiece of purple plastic is charged with 8.51 × 106 extra electrons compared to its neutral state. what is its net electric charge (including its sign) in coulombs.

Each electron provides a charge of -1.602 × 10^-19 coulombs.

If there are 8.51 × 10^-6 extra electrons:

1 electron ­ -1.602 × 10^-19 coulombs

8.51 × 10^6 electrons___x = -1.602 × 10^-19*8.51 × 10^6/1=-1.32× 10^-12 coulombs

So the extra electrons provide a charge of 1.32× 10^-12 coulombs.

So the net charge is -1.32× 10^-12 coulombs (there are more electrons besides those extra electrons, but there are also protons, so they don’t affect the net charge – the other electrons just compensate the charge of the protons).

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.

that the claims meet official rules.

don't misinterpret the claims