Polyatomic Ions
OH1-
1 Ca + ____ Cl = 1 CaCl2
NH41+
MgBr2
1 NaOH + ____ HCl = 1 NaCl + ___ H2O
PO43-
AlF3
1 CH4 + ___ O2 = 1 CO2 + ___ H2O
CrO42-
NH4OH
1 CH4 + ___ S = 1 CS2 + ___ H2S
HSO41-
Fe(NO3)3
___ CO2 + 2 H2O = 2 C2H2 + ___ O2