1.1. A student investigated two different methods to produce zinc chloride.

Method 1 is the reaction of zinc oxide with dilute hydrochloric acid.

ZnO (s) + 2HCl (aq) → ZnCl₂ (aq) + H₂O (l)

Describe how a sample of zinc chloride crystals could be made from zinc oxide and dilute hydrochloric acid.

1.2. A student wanted to make 15.0 g of zinc chloride using Method 1. 

Relative atomic masses, (A_r):     H = 1,     Cl = 35.5,     Zn = 65,     O = 16 

Calculate the mass of zinc oxide that the student should react with dilute hydrochloric acid to make 15.0 g of zinc chloride.

1.3. The percentage yield of the student's reaction to produce zinc chloride using Method 1 was 67.4 %.

Calculate the mass of zinc chloride the student actually produced.

1.4. Method 2 is the reaction of zinc carbonate with dilute hydrochloric acid.

 ZnCO₃ (s) + 2HCl (aq) → ZnCl₂ (aq) + H₂O (l) + CO₂ (g)

The atom economy for Method 1 is 88.3%.

Calculate the atom economy for Method 2.

Explain the difference in the atom economies for the two methods of making zinc chloride.