Question

how many electrons should be added into a body to make it by 5 nanogram.Mass of one electron is 9.1 ×10^-31?
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Answer 1

Answer:

1.25×20^19

Similarly use the formula q=ne for b and c where q= charge, n= no of electrons e= charge present on an electron

Explanation:

Answer 2

Answer:

5.49*10^-20

Explanation:

let n are added, so an increase in the mass is = mass of one electron* number of electrons

10^3*9.1*10^-31 * n = 5*10^-9

therefore, n =5.49*10^-20