Question

1. ethane, with the chemical formula c₂h₆, is an example of ____.

a kind of coal
a gasoline
a hydrocarbon
an isotope

Explanation:

Ethane has the formula $\text{C}_2\text{H}_6$, which only contains carbon and hydrogen atoms, fitting the definition of a hydrocarbon (compounds composed solely of carbon and hydrogen). It is not coal, gasoline (a mixture of hydrocarbons), or an isotope (variants of a single element).

Answer:

a hydrocarbon