BIOLCHEM 212 Lecture Notes - Lecture 2: Chemical Polarity, Fluorine, Ferrous
9 Oct 2015
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Due: tuesday, sept. 15, at start of discussion. Credit is awarded for 70% and above and only if all questions are attempted. Physical (change of phase or state solid to liquid) Chemical (division of a cell requires a huge number of a. ) Melting of wax c. ) burning of charcoal in a grill d. ) cloud formation e. ) growth and division of a cell chemical reactions both synthetic/anabolic and degradative/catabolic: classify the following as either a mixture or a pure substance. Indicate whether mixtures are homogeneous or heterogeneous and whether pure substances are chemical compounds or elements. a. ) Mercury in a thermometer (banned in ann arbor!) Pure substance, chemical compound: answer the following questions and show your calculations. a. ) Assume that the atomic mass of nitrogen is 14. 0. 5 moles x 2 n atoms/molecule x 14 g/mole = 140 g b. ) Assume the molecular/formula weight of kcl is 75. 6 grams/mole.
