CHE 101 Chapter Notes - Chapter 1-2: Electronegativity, Unified Atomic Mass Unit, Carbon-12
1 Sep 2016
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All matter can be classified as a mixture or pure substance. Mixtures can be further classified as either heterogeneous or homogeneous. Pure substances can be further classified as either elements or compounds. Whether you"re using a graduated cylinder, ruler, or thermometer, always have your answer go to the decimal place after what the measuring tool shows. Example: if your ruler has ticks for millimeters (goes to the thousandth place), have your answer go up to the ten thousandth place. If you had to choose between using a large graduated cylinder that only had tick marks at every integer and a small graduated cylinder that had tick marks up for milliliters, Choose the smaller graduated cylinder more precise. When reading the amount of liquid in a graduated cylinder, there will be a meniscus (apparent curvature/dip at the surface) Take the measurement from the very bottom of the meniscus.
