Question

find the total no. of electron and charge in 250gramof water​

Answer 1

Mass of 1 mole of water is 18 g as H2O has one atom of oxygen and two atoms of hydrogen and you can calculate the mass

Answer 2

single molecule :-

= 1+1+8 =10 electron

now talk about 1 mole

1 molecule=10 electron

1 mole :-

= 6.022X10 power23 molecule total electron

= 10X6.022X10power23

= 6.022X10power24 electrons