20. Construct a model of, 1-propanol, C3H7OH.... 20. Construct a model of, 1-propanol, C3H7OH. 21. What is the molecular geometry on each carbon and the oxygen of C3H7OH? 22. Construct a model of, 2-propanol, C3H7OH. 23. We see that 1-propanol and 2-propanol have the same molecular formula, C3H7OH, but different molecular structures. What is the name for molecules that have the same molecular formula but different structural formulas (different shapes)?