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Carbohydrates.
Oxygen is just oxygen. It is an elementThe oxygen used in the hospital is 100% oxygen and only contains compressed oxygen.Air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases
Gasoline always contains carbon and hydrogen and usually also contains at least small amounts of oxygen, nitrogen, and sulfur.
small amounts of hydrogen and oxygen are burned.
Beryl is composed of beryllium, aluminium, silicon and oxygen. It usually also contains trace amounts of transition metals that are responsible for its color: emerald, for example, is a variety of beryl that contains chromium and/or vanadium in small quantities.
Carbohydrates.
alcohols
There is ice beneath the surface of Mara and at its polar caps. The atmosphere contains small amounts of oxygen.
Oxygen is just oxygen. It is an elementThe oxygen used in the hospital is 100% oxygen and only contains compressed oxygen.Air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases
Gasoline always contains carbon and hydrogen and usually also contains at least small amounts of oxygen, nitrogen, and sulfur.
Dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases.
No
Andesitic
A small percent . exhaled air always contains oxygen .
The outer core of the earth is made of liquid metals, mostly nickel and iron. It contains small amounts of oxygen and sulfur.
it contains small amounts of mercury which is poisonous to humans
The main element in steel is usually iron. It also contains small amounts of other substances, to improve its properties. Often it contains some carbon (not a metal), and sometimes smaller amounts of other metals.