This is a series of chemical reactions. The balanced equations are as follows:

Cu(OH)2 + H2S → CuS + 2H2OBa(NO3)2 + H2S → BaS + 2HNO3CaCO3 + H2S → CaS + H2O + CO2

These reactions involve the formation of different sulfides when the corresponding metal hydroxide or carbonate reacts with hydrogen sulfide.