What is happening in the following reaction?

2KClO3 2KCl + 3O2

2 moles of KClO3 decomposes to form 3 moles of product.

1 mole of KClO3 decomposes to form 5 moles of product.

2 moles of KClO3 combusts to form 5 moles of product.

2 moles of KClO3 decomposes to form 5 moles of product.

The correct answer would be the last option. From the given reaction, we can say that 2 moles of the KClO3 decomposes forming 5 moles of product which is 2 moles of KCl and 3 moles of O2. A decomposition reaction involves the breaking of a molecule into two or more smaller molecules.