1. How many structural isomers are shown here? 2. What do the compounds cyclopropane and propene have in common? 3. The temperatures in a fractionating tower at an oil refinery are important, but so...

1. How many structural isomers are shown here?

2. What do the compounds cyclopropane and propene have in common?

3. The temperatures in a fractionating tower at an oil refinery are important, but so are the pressures. Where might the pressure in a fractionating tower be greatest—at the bottom or at the top? Defend your answer.