What are the formulas for the following substances? Any help is very much appreciated

a) ammonium hydrogen sulfide, b) Magnesuim Chlorite, c) Iodine heptaflouride, d) Oxygen diflouride,e) Lithium Chlorite,f) Cobalt(2)hydroxide,g)Gold(3)chloride, h)ammonium sulfite, I)Manganese(2) oxide, J) Lead (2)sulfide,,,,,,,,thank you so much

These are compounds that you need to practice on.

NH4 + is ammonium
hydrogen is +
sulfide is -2
NH4HS

Chlorite is ClO2-
Mg is +2
Mg(ClO2)2

iodine heptafluoride IF7

oxygen difluoride OF2

Lithium +1
chlorite ClO2-
LiClO2

Co+2
OH-
Co(OH)2

Au +3
Cl-1
AuCl3

NH4+
Sulfite SO3-2
(NH4)2SO3

Mn+2
O-2
MnO

Pb+2
S-2
PbS