Question

find the total charge carried by electron in 1 gram of water​

Answer 1

first of all, find number of mole of water

molecular weight of water = 18 g/mol

so, number of mole of water = 1/18

so, number of molecules of water = mole of water × Avogadro's number

= 1/18 × 6.023 × 10²³

= 0.3346 × 10²³

= 3.346 × 10²²

number of electrons in one molecule of water = 2 × 1e of hydrogen + 8e of oxygen = 10e

so, number of electrons in 3.346 × 10²² molecules of water = 10 × 3.346 × 10²²

= 3.346 × 10²³

now, charge on one electron =- 1.6 × 10^-19C

so, charge on 3.346 × 10²³ electrons = - 3.346 × 10²³ × 1.6 × 10^-19 C

= 5.35 × 10⁴ C