List the number of each atom in the formulas above:
H
O
C
I just need the carbon

Answer:
In all all the given formulas the number of atoms of hydrogen , oxygen and carbon are same that 8,1 and 3 respectively.
Explanation:
Point at which lines are intersecting is denoted as carbon atoms
Number of atoms of different elements in following formulas:
1) [tex]CH_3-CH_2-CH_2-OH[/tex]
Number of hydrogen atom = 8
Number of carbon atoms = 3
Number of oxygen atoms = 1
2) [tex]CH_3-CH(OH)-CH_3[/tex]
Number of hydrogen atom = 8
Number of carbon atoms = 3
Number of oxygen atoms = 1
3) [tex]CH_3-CH_2-O-CH_3[/tex]
Number of hydrogen atom = 8
Number of carbon atoms = 3
Number of oxygen atoms = 1