How many megacoulombs of positive(or negative) Charge are present in 2.0 mol of neutral hydrongen gas.

Explanation

Number of molecules in `2.0` mol of `H_(2)` gas is
`=2(6.02xx10^(23)=12.04xx10^(23)`
As each `H_(2)` molecule contains 2 electrons (and 2 protons), number of electrons (and protons) in `0.2` mol of `H_(2)` gas is
`n=2(12.02xx10^(23)=24.08xx10^(23)`
Thus, `q="ne"=(24.08xx10^(23))(1.6xx10^(-19)C)`
`=0.358xx10^(6)C=0.358MC`.