Supplemental InstructionTiffany SiaCHEM [email protected] Reislerwww.usc.edu/siWeek 2 (8/27-8/31)Welcome to CHEM 115a SI! I hope you all had a fun time during Welcome Week and your first week of classes wasn’t toobad. With that said, it’s time to start studying! During our SI sessions, I will conduct a review of the material that Dr. Reisler went over the previous week. I will try and make the review as fun as possible while covering the important concepts. But before I get started, here’s a bit of quirky news for you: A boy in China was recently taken to a hospital ER due to a frozen soda can that exploded when he tried to open it. The moment he popped the tab, the top blew off, propelling sharp aluminum shards. He received 31 stitches on his face and 7 in his mouth. Any ideas of what happened?1. Mattera.b. Indicate whether the following are homogeneous or heterogeneous mixtures, or pure elements or compounds. i. Non-iodized Table Salt is a(n) ___________________________ii. Air is a(n) _________________________________iii. Salad is a(n) _______________________________iv. Hydrogen gas is a(n) _________________________2. Physical and Chemical ChangesDefinition: Examples:Physical ChangesChemical Changes3. Units of Measurement: Temperaturea. Formulas:i. TK = TC + ___________Topics on this sheet:1. Definitions2. Units3. Sig FigsMatterCompoundMixtureSupplemental InstructionTiffany SiaCHEM [email protected] Reislerwww.usc.edu/siii. Tc = (Tf - _______) * _________*Remember that in order to convert from Fahrenheit to Kelvin, you must first convert to Celsius!4. Sig Figsa. Determine whether the following are significant or insignificant:i. Trailing zeros in a number with a decimal point ii. Captured zeros iii. Trailing zeros in a number without a decimal point iv. Leading zeros b. T/F: Exact numbers cannot be used to limit the precision of a calculationc. T/F: A measurement always has some degree of uncertainty. d. (0.00503 + 0.034) / 1.18 = e. (3785.4 / 24.9) – (0.500 + 10.) = f. 1.285 x 10-2 + 1.24 x 10-3 + 1.879 x 10-1 = g. % Error:(8.925 – 8.905) / 8.905 x 100% = 5. Dimensional Analysisa. Storage freezers used in molecular biology labs are usually set to -80.0 °C. What is this temperature in Kelvins? In degrees Fahrenheit?b. Curious Calvin measures the volume of a Fed-Ex box to be 8.00 ft3. What is the volume of the box in centimeters3? (1 inch = 2.54 centimeters)Supplemental InstructionTiffany SiaCHEM [email protected] Reislerwww.usc.edu/si*To review on your own: logarithms & exponents, quadratic equations, SI units,
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