list the number of each atom in the formulas above:\nh\no\nc

Explanation:

Step1: Count H atoms

Count all H - atoms in three structures. First structure has 8 H, second has 8 H and third has 8 H. So total H = 8 + 8+ 8 = 24.

Step2: Count O atoms

Count O - atoms. First structure has 1 O, second has 1 O and third has 1 O. So total O = 1 + 1+ 1 = 3.

Step3: Count C atoms

Count C - atoms. First structure has 3 C, second has 3 C and third has 3 C. So total C = 3 + 3+ 3 = 9.

Answer:

H: 24 O: 3 C: 9