Answer:
Explanation:
We know the area of the rectangle is length * width
We also know width = length - 5
Thus area is 
There are different kinds of functional group. The answer to the functional group, is below.
- (OH) Alcohol is one of the most polar and may act as a weak acid
- (COOH) Carboxylic acid serves as the acid.
- (C=O) Aldehyde: can be an isomer of a chemical ketone
- (S-H) Thiol usually transform to a disulfide bond
- (NH2) Amine serves to be the base of chemical compounds
- (PO4) Organic phosphate carries a negatively charged atom.
<h3>What is functional group ?</h3>
A functional group in organic chemistry is known to be a composition of atoms that is found inside a molecules that often bind together to react in certain ways.
The Examples of functional groups are the group hydroxyl, ketone, amine, and others.
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