Question

Which reaction below represents a balanced, decomposition chemical reaction?

A)
2MgO → Mg + O2


B)
2Al + 3Br2 → 2AlBr3


C)
2KClO3 → 2KCl + 3O2


D)
C5H12 + 8O2 → 5CO2 + 6H2O

Answer 1

C

Step-by-step explanation:

bazinga

Answer 2

We can first rule out choices B and D because in decomposition reactions, one reactant is decomposed or broken up to form two or more products. Choices B and D are incorrect because they both have two reactants.

Then we need to determine which choice, A or C, is correctly balanced. Choice A is incorrectly balanced because there are 2 moles of magnesium on the reactants side but only one mole of magnesium on the products side. Therefore, C is the correct choice because it is correctly balanced.

Hope this helps.