density= .856 g/mL The substance is toulene
Work Step by Step
This question is basically a density problem. We are given the mass (38.5 grams) and the volume (45 mL) and told to find the density. To do this, we use the density formula, which is density=mass/volume. When we solve, we get a density of .856 g/mL. Now we have to identify whether the substance is toulene (which has a density of .866 g/mL) or isopropyl alcohol (with a density of .785 g/mL). Since our experimental density is closer to that of toulene, we can assume our substance is toulene.