the density of pure isopropyl alcohol at 20 degree Celsius is 0.7854g/mL. The density of pure water at 20 degree Celsius is 0.9982 g/mL. In this lab you are given that the density of 91% isopropyl alcohol is 0.817 g/mL. Isopropyl alcohol will evaporate quicker than water. Based on this information, if the bottle of 91% alcohol was an older bottle that had been left open quite a bit, this would result in an error with your results. Would you expect this error to cause your experimental density to be greater than or less than 0.817 g/mL? Explain your logic.