In an experiment, potassium chlorate decomposed according to the following chemical equation:
2KClO3 → 2KCl + 3O2
(Molar mass of KClO3 = 122.5 g/mol; KCl = 74.55 g/mol; O2 = 31.998 g/mol)
If the mass of KCl produced was 180 grams, which of the following calculations can be used to determine the mass of potassium chlorate decomposed?