Question

Помогите, пожалуйста, с химическими уравнениями 1. CaCO3 — CaO + O2 2. NaOH + H2SO4 — Na2SO4 + H2O 3. CuSO4 + NaOH — Na2SO4 + Cu (OH)2 4. Al (OH)3 — Al2O3 + H2O 5. Al + H2SO4 — Al2 (SO4)3 + H2 6. Cu (OH)2 + HNO3 -- Cu (NO3)2 + H2O

Answer 1

1. CaCO3 — CaO + O2
2. 2NaOH + H2SO4 — Na2SO4 +2H2O
3. CuSO4 + 2NaOH — Na2SO4 + Cu (OH)2
4. 2Al (OH)3 — Al2O3 + 3H2O
5.2 Al + 3H2SO4 — Al2 (SO4)3 + 3H2
6. Cu (OH)2 +2 HNO3 -- Cu (NO3)2 +2 H2O

Answer 2

1)CaCO3=CaO+CO2
2)2NaOH+H2SO4=Na2SO4+H2O
3)CuSO4+2NaOH=Na2SO4+Cu(OH)2
4)2Al(OH)3=Al2O3+3H2O
6)2Al+3H2SO4=Al2(SO4)3+3H2
7)Cu(OH)2+2HNO3=Cu(NO3)2+2H2O

Answer 3

1. The chemical equation for the reaction between calcium carbonate (CaCO3) and heat to produce calcium oxide (CaO) and oxygen gas (O2) is:

CaCO3 → CaO + O2 [[1]]

2. The chemical equation for the reaction between sodium hydroxide (NaOH) and sulfuric acid (H2SO4) to produce sodium sulfate (Na2SO4) and water (H2O) is:

2NaOH + H2SO4 → Na2SO4 + 2H2O [[2]]

3. The chemical equation for the reaction between copper sulfate (CuSO4) and sodium hydroxide (NaOH) to produce sodium sulfate (Na2SO4) and copper hydroxide (Cu(OH)2) is:

CuSO4 + 2NaOH → Na2SO4 + Cu(OH)2 [[3]]

4. The chemical equation for the reaction between aluminum hydroxide (Al(OH)3) and heat to produce aluminum oxide (Al2O3) and water (H2O) is:

2Al(OH)3 → Al2O3 + 3H2O [[4]]

5. The chemical equation for the reaction between aluminum (Al) and sulfuric acid (H2SO4) to produce aluminum sulfate (Al2(SO4)3) and hydrogen gas (H2) is:

2Al + 3H2SO4 → Al2(SO4)3 + 3H2 [[5]]

6. The chemical equation for the reaction between copper hydroxide (Cu(OH)2) and nitric acid (HNO3) to produce copper nitrate (Cu(NO3)2) and water (H2O) is:

Cu(OH)2 + 2HNO3 → Cu(NO3)2 + 2H2O [[6]]

Please note that these equations represent the balanced chemical reactions, where the number of atoms of each element is the same on both sides of the equation.