In lab, you determine that the mass of a Florence flask and a piece of aluminum foil weigh 39.862 g. After performing the experiment on an unknown, you find that the flask, foil, and condensed vapors weigh 40.572 g. The flask was removed at 98.3oC when all the liquid was vaporized. At the end of the experiment you place the Florence flask and foil on the balance, fill the flask with water at 20.2∘ C, and find a mass of 165.033 g. If the current barometric pressure is 756 torr, what is the molar mass of your unknown? Report your answer to one place after the decimal.

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Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.