Carbohydrates are chemical compounds that contain only oxygen, hydrogen and carbon.

But the gas rises; Robin realizes it must contain hydrogen.

In 1815 he proved that prussic acid contains hydrogen and not oxygen.

The green spot, on the other hand, contained hydrogen, carbon, nitrogen, and oxygen.

This is especially important for systems containing hydrogen which is often found at temperatures far above its critical point.

Carbohydrates in pure form contain only carbon, hydrogen, and oxygen.

The outer atmospheric layer contained very little hydrogen and no atomic oxygen.

Some cylinders, he said, contained hydrogen, while others held gases that were not immediately identified.

The starting material, methane, contains only carbon and hydrogen, as CH4.

Tallying the signals makes it possible to determine concentrations of fat and water, which both contain hydrogen.