C) How many grams of oxygen will be produced if 2.3 moles of mercury are produced?

Acertain atom has 22 protons and 19 electrons. this atom loses an electron. the net charge on the atom is now 4+1+01-4-. if this same atom with 22 protons and 19 electrons were to gain 3 electrons, the net charge on the atom would be 3+2+02-3-.

Can someone me with these problems? see the attachment, .

How to balance an unbalanced equation