Determine the total charge Q of electrons, the total mass of which is m = 72.8 g. The mass of one electron is

univerkov | August 9, 2021 | education

Determine the total charge Q of electrons, the total mass of which is m = 72.8 g. The mass of one electron is m () = 9.11 • 10 ^ 31 kg. The electron charge e0 = -1.6 ∙ 10 ^ -19C.

Data: m (total mass of all electrons taken) = 72.8 g (72.8 * 10 ^ -3 kg).

Constants: by condition m1 (mass of one electron) = 9.11 * 10 ^ -31 kg; e0 (charge of one electron) = -1.6 * 10 ^ -19 C.

1) Determine the number of electrons in a given mass: n = m / m1 = 72.8 * 10 ^ -3 / (9.11 * 10 ^ -31) = 7.99 * 10 ^ 28 electrons.

2) Let’s calculate the total charge of all electrons: q = n * e0 = 7.99 * 10 ^ 28 * 1.6 * 10 ^ -19 = 12.8 * 10 ^ 9 C (12.8 GC).

Answer: The total charge of all electrons is 12.8 Gcal.

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