Question

NEED HELP ASAP! I will post the observation now in different question​

Answer 1

A. NO2 gas released,
`NO_(3)^(-)` ion is present.

The residue is (ZnO) Zn oxide,
`Zn^(2+)` ion is present.

The white salt is Zn(NO3)2.

B. CO2 gas released,
`CO_(3)^(2-)` ion present.

The residue ia (CuO ) Cu(||) oxide,
`Cu^(2+)` ion present .

The green salt is CuCO3.

C. CO2 gas released,
`CO_(3)^(2-)` ion present.

The residue Pb(||) oxide,
`Pb^(2+)` ion is present.

The white salt is PbCO3.

D. CO2 gas released,
`CO_(3)^(2-)` ion present.

The residue is (ZnO) Zn oxide,
`Zn^(2+)` ion is present.

The white salt is ZnCO3.