(a) After the label fell off a bottle containing a clear liquid believed to be benzene, a chemist measured the density of the liquid to verify its identity. A 25.0-mL portion of the liquid had a mass of 21.95 g. A chemistry handbook lists the density of benzene at 15 °C as 0.8787 g/mL. Is the calculated density in agreement with the tabulated value?

Video transcript

Hi everyone today, we have a question telling us that a student needs cycle hexane. For an experiment. They asked their lab partner to get it from the storage cabinet. The lab partner then handed an unlabeled bottle and told them that it was the bottle for psycho Heche, saying that they used in the last experiment, To be sure they measured 15 millions of the liquid and found that it weighs 26.2 g. A chemistry textbook listed cyclo hexane to have a density of 0.773 g per millimeter at room temperature. Is it possible that the liquid is cyclo hexane? So we are going to use the formula mass equals volume times density. And we are looking for density. So density is going to equal mass divided by volume. And now we can plug in what we know. So density equals 26 0. g over mL And that equals 1.75 g per mil leader. And we're comparing that to 0.773 g per mil leader. So that is too far off. So now it cannot be psycho haixing. And those are our answers. Thank you for watching. Bye.