The total number of electrons present in 18 ml of water is .......................
density of water = 1g/ml
mass of 18ml of water = densityx volume =( 1g/ml)*(18ml) = 18g
no. of mol of water = 18g/18g/mol = 1 mol
1molecule of water contain 8 electrons
1mol of water contain 8*(6.02x1023)
= 48.16x1023