examples of synthesis reactions and decomposition reactions?

Synthesis reactions:
1. Formation of water from hydrogen and oxygen: 2H2 + O2 → 2H2O
2. Formation of ammonia from nitrogen and hydrogen: N2 + 3H2 → 2NH3
3. Formation of magnesium oxide from magnesium and oxygen: 2Mg + O2 → 2MgO

Decomposition reactions:
1. Decomposition of hydrogen peroxide into water and oxygen: 2H2O2 → 2H2O + O2
2. Decomposition of calcium carbonate into calcium oxide and carbon dioxide: CaCO3 → CaO + CO2
3. Decomposition of hydrogen chloride into hydrogen and chlorine: 2HCl → H2 + Cl2

Synthesis Reactions

- Formation of sodium chloride (NaCl) from sodium (Na) and chlorine (Cl2)
```
2Na + Cl2 → 2NaCl
```
- Formation of water (H2O) from hydrogen (H2) and oxygen (O2)
```
2H2 + O2 → 2H2O
```
- Formation of carbon dioxide (CO2) from carbon (C) and oxygen (O2)
```
C + O2 → CO2
```
- Formation of calcium oxide (CaO) from calcium (Ca) and oxygen (O2)
```
2Ca + O2 → 2CaO
```
- Formation of magnesium nitride (Mg3N2) from magnesium (Mg) and nitrogen (N2)
```
3Mg + N2 → Mg3N2
```

Decomposition Reactions

- Decomposition of hydrogen peroxide (H2O2) into water (H2O) and oxygen (O2)
```
2H2O2 → 2H2O + O2
```
- Decomposition of calcium carbonate (CaCO3) into calcium oxide (CaO) and carbon dioxide (CO2)
```
CaCO3 → CaO + CO2
```
- Decomposition of ammonium nitrate (NH4NO3) into nitrogen gas (N2), water (H2O), and oxygen (O2)
```
NH4NO3 → N2 + 2H2O + O2
```
- Decomposition of potassium chlorate (KClO3) into potassium chloride (KCl) and oxygen (O2)
```
2KClO3 → 2KCl + 3O2
```
- Decomposition of silver oxide (Ag2O) into silver (Ag) and oxygen (O2)
```
2Ag2O → 4Ag + O2
```