Give the balanced equation for the following:
 
1. To balance the following chemical equation, the values of the coefficients x, y, z and w must be respectively

\(xFeSO_4\) \(\overset{\Delta}{\rightarrow}\) \(yFe_2O_3 + zSO_2 + wSO_3\)
 
2. Change the following statement into chemical equations.

Hydrogen sulphide gas burns in air to give water and sulphur dioxide