Answer
a) Zinc Acetate
b) Magnesium Phosphate
c) Ammonium Chloride
d) Sodium Bicarbonate or Sodium Hydrogen Carbonate
Work Step by Step
$a) Zn(C_{2}H_{3}O_{2})_{2}$= Zinc Acetate
$b) Mg_{3}(PO_{4})_{2}$= Magnesium Phosphate
$c) NH_{4}Cl$= Ammonium Chloride
$d) NaHCO_{3}$= Sodium Bicarbonate or Sodium Hydrogen Carbonate