A piece of plastic has a net charge of +2.00 μC. How many more protons than electrons does this piece of plastic have? (e = 1.60 × 10^-19 A) 1.25 × 10¹³ B) 1.25 × 10¹⁹ C) 2.50 × 10¹³ D) 2.50 × 10¹⁹ E) 3.01 ×10²³

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Quizplus · Accepted Answer

The net charge of +2.00 μC means there is an excess of protons. The charge of one proton is 1.60 × 10^-19 C. Dividing the total charge by the charge of one proton gives the number of excess protons: (2.00 × 10^-6 C) / (1.60 × 10^-19 C/proton) = 1.25 × 10^13 protons.

A Piece of Plastic Has a Net Charge of +2