Question

How many electrons are needed to form a charge of
−4.70 nC

Answer 1

Q = -4.70 nC = -4.70 × 10⁻⁹ C

e = -1.602 × 10⁻¹⁹ C

N: number of electrons

Ne = Q → N = Q/e
N = (4.70/1.602) × 10⁻⁹ × 10¹⁹
= 2.934 × 10¹⁰

"2.934 × 10¹⁰ electrons are require to form a charge of -4.70 nC"