Asubstance with a density of 2.70 g/ml occupies a volume of 21.3 ml. what is the mass of the sample? report your answer in units of mg. use significant figures. do not enter “mg” as part of your answer. do not use scientific notation.

The following transition occurs at a molecular level for a substance. what transition corresponds to this change in microscopic structure? the carbon dioxide molecules on the left are in a regular, tightly packed pattern. after heating, it becomes much lower density. a. melting b. boiling c. sublimation d. freezing