When cars burn gasoline they emit nitrous oxide and chemicals called volatile organic compounds.

However, there is a class of compounds, called non-stoichiometric compounds, that cannot be represented by small integers.

The Clean Air Act requires, in a different section, that emissions of those chemicals, called volatile organic compounds, be cut by 15 percent.

It's from chemicals called volatile organic compounds (VOCs), some of which have been linked to cancer.

Compounds containing bonds between carbon and a metal are called organometallic compounds.

The rover's science payload can identify other ingredients of life, such as the carbon-based building blocks of biology called organic compounds.

They are also called pentavalent antimony compounds.

Called "organic compounds," because they have a molecular base containing carbon atoms, they are better known as solvents.

Compounds where iron has two electrons taken are called ferrous compounds.

Compounds where iron has three electrons taken are called ferric compounds.