What is the total charge, in coulombs, of all the electrons in three gram mole o' hydrogen atom?

Answer

A, B, C

Explanation

Number of atoms in `3` gram mole of hydrogen atom `=` number of electrons in it
`=3N_0=(3xx6.02xx10^23)`
where `N_0=` Avogadro number
`:.` total charge
`=-(1.6xx10^-19)(3xx6.02x10^23)` ltbr `=-2.89xx10^5C`