For each reaction below, write the balanced equation.

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

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".