# How many electrons will have a mass of 1 mg?

July 29, 2021 | education

| The number of electrons is calculated by the formula:

N = m / m1, where N is the required number of electrons, m is the total mass of electrons (m = 1 mg = 1 * 10 ^ -6 kg), m1 is the mass of one electron (m1 = 9.1 * 10 ^ -31 kg ).

Let’s calculate the number of electrons:

N = m / m1 = 1 * 10 ^ -6 / 9.1 * 10 ^ -31 = (1 / 9.1) * 10 ^ 25 = 0.11 * 10 ^ 25 electrons.

Answer: The mass of 1 mg is 0.11 * 10 ^ 25 electrons.

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