Multiple choice general knowledge science & technology manganese(IV) sulfate Mn3(SO4)2 Mn(SO4)2 Mn3SO4 None of the above Reveal answer Fill a bubble to check yourself B Correct answer Explanation Manganese(IV) indicates Mn^4+ ion. Sulfate is SO4^2- with a -2 charge. To balance the +4 charge of manganese, two sulfate ions are needed, giving Mn(SO4)2. Option B is correct.