list the number of each atom in the formulas above: h o c done

Explanation:

Step1: Count hydrogen atoms

Count all the 'H' in the three structures. In the first structure, there are 8 H; in the second, 8 H; in the third, 8 H. So in total, $8 + 8+8=24$ H.

Step2: Count oxygen atoms

In the first structure, there is 1 O; in the second, 1 O; in the third, 1 O. So in total, $1 + 1+1 = 3$ O.

Step3: Count carbon atoms

In the first structure, there are 3 C; in the second, 3 C; in the third, 3 C. So in total, $3+3 + 3=9$ C.

Answer:

24 3 9