Question

If q is the positive charge on each molecule of water. What is the total positive charge in 360 g of water

Answer 1

q is the positive charge on each molecule of water {H2O}.
molecular weight of H2O = 2 + 16 = 18 gm/mol
first of all, we have to find number of mole.

mole = given weight /molecular weight
given weight = 360 gm
molecular weight = 18gm/mol
so, mole = 360/18 = 20mol

now, number of water molecule in 20 mole = 20 × 6.023 × 10²³
= 1.2046 × 10^25

because each molecule of water contains q positive charge.
so, charges on 1.0246 × 10^25 molecule of water = (1.2046 × 10^25)q

hence, total positive charge in 360g = (1.2046 × 10^25)q