Answer:
CO
Explanation:
the rest are elements. CO is made up of one carbon atom and one oxygen atom
Structural formula is the formula which shows the arrangement of atoms in the molecule of a compound
2-methylbutan-2-ol is an alcohol which the functional group (OH) is attached in carbon number two and also has methyl group in carbon number two.
The structural formula of 2=methylbutan-2-ol is as the attachment below
Nitrogen makes about 78% of the air we breathe. Nitrogen is extremely important in living things. <span>It forms the building blocks of proteins. We need proteins because they make up our skin and hair. Proteins also help us digest food. We get our nitrogen from plants, and plants get it from bacteria in the soil. Our atmosphere provides life with the nitrogen it needs.</span>