The chemical equation below shows what happens when propane reacts with oxygen to form carbon dioxide and water. C3H8 + 5O2 → 3CO2 + 4H2O Which component of the reaction is composed of an element and not a compound? Group of answer choices

a. O2

b. C3H8

c. CO2

d. H2O

The correct option is A. O2 is composed of elements and not compounds.

Explanation:

An element can be described as a substance that cannot be broken down into any simpler substance because it is made up of the same type of atoms. The periodic table consists of all the elements that scientists have discovered. For example, the element hydrogen.

On the other hand, a compound can be described as a mixture of two elements. Hence, The options B, C, D are incorrect because each option is a compound.

The option A comprises of two atoms of the same element i. e oxygen. hence, A is the correct option.