Question

the charge on one gram ions of Al+3 is

Answer 1

1 - gram ions is same as 1 mole.

So, we need to find only the charge on 1 mole of ions, i.e.,

NA×3eNA×3e colulomb.

Answer 2

289500 coloumbs because
Charge on one mole of electrons =6.023×1023×1.6×10−19C=6.023×1023×1.6×10−19C
=96500coulomb=96500coulomb
1 gram ions means 1 mole
Charge on 1 mole of Al3+ion=3×96500coulomb