How do you solve for thickness , then use to find the atom number? ( Question 5)

For which one of the following reactions is the value of δh° rxn equal to δh° f for the product? a. 2 h2 (g) + o2 (g) → 2 h2o (l) b. n2 (g) + o2 (g) → 2 no (g) c. 2 h2 (g) + o2 (g) → 2 h2o (g) d. h2o (l) + 1/2 o2 (g) → h2o2 (l) e. none of the above

What reaction is taking place? 02 + c3h8 = h20 + co2

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.