5. Predict which compound in each of the following pairs has the greater percentage of carbon, by mass. Explain (a) C2H4 or C3H4 (b) C2H4 or C3H6 (c) C2H4 or C2H6

Answer 1

If you look carefully you can do each by inspection of the carbon to hydrogen ratio (a) C₃H₄

(b) C₃H₆ (c) C₂H₄