(a)[2]
Calculate the percentage by mass of oxygen in potassium chlorate.
(b)[3]
Calculate the maximum volume of oxygen formed at room temperature and pressure when 12.25 g of potassium chlorate is completely decomposed.
(c(i))[3]
Explain in terms of gain and loss of electrons, how potassium ions and chloride ions are formed when potassium reacts with chlorine.
(c(ii))[2]
Predict two physical properties of potassium chloride.