Question

How many positive and negative charges is there in acup of water ? Consider that the cup contains 250 gm of water.​

Answer 1

One molecule of water has 2 hydrogen atoms (2 protons) and one oxygen atom (8 protons). So 250 g water will have 10 x 8.36 x 1024 = 8.36 x 1025 protons. So one cup of water has 13.3 mega coulomb positive and negative charge, so that the overall charge is zero... In general or in an ideal condition both should be equal.