Answer:
Step-by-step explanation:
Al + O₂ → AlO₂
Balanced chemical equation:
Al + O₂ → AlO₂
In this equation Aluminium is reducing agent while oxygen is oxidizing agent.
K + Br₂ → KBr
Balanced chemical equation:
2K + Br₂ → 2KBr
This is balanced chemical equation because there are equal number of potassium and bromine atoms are present on both side of equation.
Mg + HCl → MgCl₂ + H₂
Balanced chemical equation:
Mg + 2HCl → MgCl₂ + H₂
This is balanced chemical equation because there are equal number of magnesium, hydrogen and chlorine atoms are present on both side of equation.
Al + O₂ → Al₂O₃
Balanced chemical equation:
4Al + 3O₂ → 2Al₂O₃
This is balanced chemical equation because there are equal number of aluminium and oxygen atoms are present on both side of equation.
Na + MgF₂ → NaF + Mg
Balanced chemical equation:
2Na + MgF₂ → 2NaF + Mg
This is balanced chemical equation because there are equal number of sodium, magnesium and fluorine atoms are present on both side of equation.
Na + HCl → NaCl + H₂
Balanced chemical equation:
2Na + 2HCl → 2NaCl + H₂
This is balanced chemical equation because there are equal number of sodium, hydrogen and chlorine atoms are present on both side of equation.
SiO₂ + HF → SiF₄ + H₂O
Balanced chemical equation:
SiO₂ + 4HF → SiF₄ + 2H₂O
This is balanced chemical equation because there are equal number of silicon, oxygen and fluorine atoms are present on both side of equation.
FeS₂ + O₂ → Fe₂O₃ + SO₂
Balanced chemical equation:
4FeS₂ + 11O₂ → 2Fe₂O₃ +8 SO₂