Cr + Cu(NO3)2 = Ca(OH)2 + NH4Cl = AgNO3 + HCl = K2CO3 + HNO3 = CaCO3 + H2SO4 = NaF + HBr = Al2O3 + K2SO3 = SiO2 + MgCO3 = ZnO + Na2CO3 = P2O5 + Na2CO3 разложение ZnCO3 =

Here are the chemical reactions you requested, including the products formed:

1. Cr + Cu(NO3)2 → Cr(NO3)2 + Cu

   • Chromium displaces copper from copper(II) nitrate.

2. Ca(OH)2 + 2NH4Cl → CaCl2 + 2H2O + 2NH3

   • Calcium hydroxide reacts with ammonium chloride to form calcium chloride, water, and ammonia.

3. AgNO3 + HCl → AgCl + HNO3

   • Silver nitrate reacts with hydrochloric acid to produce silver chloride and nitric acid.

4. K2CO3 + 2HNO3 → 2KNO3 + H2O + CO2

   • Potassium carbonate reacts with nitric acid to produce potassium nitrate, water, and carbon dioxide.

5. CaCO3 + H2SO4 → CaSO4 + CO2 + H2O

   • Calcium carbonate reacts with sulfuric acid to produce calcium sulfate, carbon dioxide, and water.

6. NaF + HBr → NaBr + HF

   • Sodium fluoride reacts with hydrobromic acid to form sodium bromide and hydrofluoric acid.

7. Al2O3 + 3K2SO3 → Al2(SO3)3 + 6K

   • Aluminum oxide reacts with potassium sulfite to form aluminum sulfite and potassium.

8. SiO2 + MgCO3 → MgSiO3 + CO2

   • Silicon dioxide reacts with magnesium carbonate to form magnesium silicate and carbon dioxide.

9. ZnO + Na2CO3 → Na2ZnO2 + CO2

   • Zinc oxide reacts with sodium carbonate to produce sodium zincate and carbon dioxide.

10. P2O5 + Na2CO3 → 2NaPO3 + CO2

    • Phosphorus pentoxide reacts with sodium carbonate to produce sodium phosphate and carbon dioxide.

11. The decomposition of ZnCO3 (zinc carbonate):

• ZnCO3 → ZnO + CO2
• Zinc carbonate decomposes on heating to produce zinc oxide and carbon dioxide.

If you need further assistance or details, feel free to ask!