Question

answer the questions in the table below about this molecule:
what is this molecules chemical formula?
note: write the simplest molecular chemical formula, in which each element symbol appears only once.
how many ch₃, ch₂, and ch groups are in this molecule?

Explanation:

Step1: Count atoms for chemical formula

The molecule has 4 carbon (C) atoms, 8 hydrogen (H) atoms and 1 oxygen (O) atom. So the chemical formula is $C_4H_8O$.

Step2: Identify $CH_3$, $CH_2$ and $CH$ groups

• For $CH_3$: There is 1 methyl ($CH_3$) group at one - end of the molecule.
• For $CH_2$: There are 2 methylene ($CH_2$) groups in the middle of the carbon - chain.
• For $CH$: There are 0 $CH$ groups.

Answer:

What is this molecule's chemical formula?: $C_4H_8O$
How many $CH_3$, $CH_2$, and $CH$ groups are in this molecule?
$CH_3$: 1
$CH_2$: 2
$CH$: 0