1.1. This question is about iron and iron compounds.

Iron reacts with chlorine to form iron(III) chloride, Fe₂Cl_6.

Balance the chemical equation for this reaction.

.....Fe + .....Cl₂ → Fe₂Cl₆

1.2. The structure of an ion is shown.

Deduce the molecular formula of this ion to show the number of iron, carbon and nitrogen atoms.

1.3. This question is about chlorine and compounds of chlorine.

Chlorine reacts with warm turpentine, C₁₀H₁₆.

Balance the chemical equation for this reaction.

C₁₀H₁₆ + 8Cl₂   → .....C + .....HCl

1.4. The equation shows the effect of heat on anhydrous zinc sulfate.  

 ZnSO₄ $\overset{heat}{\rightarrow}$ ZnO + SO₃

When 12.60 g of anhydrous zinc sulfate is heated, the mass of zinc oxide formed is 6.34 g.

Calculate the mass of zinc oxide formed when 63.0 g of anhydrous zinc sulfate is heated.

mass of zinc oxide = _______________

1.5. Complete the table to calculate the relative formula mass of anhydrous zinc sulfate, ZnSO₄. Use your Periodic Table to help you.

relative formula mass = _________________