Sometimes a formula includes a group of symbols in parentheses. Symbols in
parentheses represent atoms that are held together as a group within the compound.
Subscripts outside the parentheses show the number of groups there are in the
compound. For example, the chemical formula Al₂(SO), describes a compound that
contains 2 aluminum atoms, 3 sulfur atoms, and 12 oxygen atoms.
6. How many atoms of each element are in the compound described by this
chemical formula?
(CH₂)₂N
Each molecule of the compound has 2
atom(s) of hydrogen (H), and,
atom(s) of carbon (C),
atom(s) of nitrogen (N).