How much negative charge is in 10 mol of neutral Helium gas

How much negative charge is in 1.0 mol of neutral Helium gas? Each He atom has two electrons in its atomic shell.

Solution

Since we know that there is only 1 mol of helium that means the number of atoms is equal to Avagadro\'s constant 6.022 X 10^23

Since helium is atomic number 2, and we can assume that this helium is neutral, this means that there should be 2 electrons and 2 protons for each helium atom for a total of :
2 * 6.022 X 10^23 = 1.204 X 10 ^24 electrons

I couldn\'t remember the exact charge on an electron, but according to wikipedia it is -1.602 X 10^-19 C. The negative doesn\'t really matter for this problem so I just multiplied out:
1.204 X 10^24 * 1.602 X 10^-19 C = 192900 C or 1.929 X 10^5 C