Let's find out!
1.0 kg H2O (1000 g/1 kg)(1 mole H2O/18.016 g)(6.022 X 10^23/1 mole H2O)
= 3.34 X 10^25 atoms water
--------------------------------------Since hydrogen has one electron and there are two hydrogen.
2 * 3.34 X 10^25 atoms water
= 6.69 X 10^25 electrons of hydrogen
===================================Oxygen has eight electron, but only one oxygen atom per molecule.
8 * 3.34 X 10^25 atoms water/atoms O
= 2.67 X 10^26 electrons of oxygen
==================================Total electrons.
2.67 X 10^26 + 6.69 X 10^25
= 3.34 X 10^26 total electrons
==============================Charge on one electron times total electrons.
- 1.602 X 10^-19 coulomb * 3.34 X 10^26 total electrons
= - 5.35 X 10^7 coulomb
=========================Final answer.