A chemist prepares a solution of aluminum chloride (AIC13) by measuring out 13. umol of aluminum chloride into a 250. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mmol/L of the chemist's aluminum chloride solution. Be sure your answer has the correct number of significant digits. 0 mmol L X S

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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.