CHEM 1201 January 20 Notes
CHEM 1201 January 20 Notes CHEM 1201
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This 2 page Class Notes was uploaded by Kelsie Carter on Friday February 19, 2016. The Class Notes belongs to CHEM 1201 at University of Colorado Colorado Springs taught by Kristi Follett in Winter 2016. Since its upload, it has received 34 views. For similar materials see in Chemistry at University of Colorado Colorado Springs.
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Date Created: 02/19/16
Chapter 1 I. Chemistry- study of composition of substances or matter and the changes they undergo II. Scientific Method A. Observation= question B. Hypothesis= tentative assumption C. Experiment= test D. Theory= alter, reject, accept III. Scientific Notation- used to represent very large or very small numbers A. General Form: Mx10^n 1. M= number between 1 and 10 2. n= exponent B. Positive Exponent: very large number (move the decimal to the right) Negative Exponent: very small number (move the decimal to the left) C. EE (button on the calculator) 1. 0.00073 = 7.3 x 10^-4 2. 7.29 x 10^-4 = .000729 3. 56000 = 5.6 x 10^4 4. 3.72 x 10^5 =372000 IV. Measurement- include number and unit A. Metric system- based on tens B. Base units 1. Length= meters (M) (1M=39.4 in) 2. Volume= liter (L) (mL=cm^3= 1cc) 3. Mass (amount of matter) = grams (g) (1kg= 2.2 lb) *weight depends on gravity (force) 4. Time= seconds (secs, s) 5. Temperature= Celsius (degrees C) or Kelvin (K) a. Kelvin= C°+273 b. Fahrenheit= 1.9(C°) +32 c. Celsius= F°-32/ 1.8 Example: 1.) 37°C = 310 K 2.) 37 °C = 98.6 °F (body temperature) 3.) 0°C = 273 K = 32 °F 4.) 100 °C = 212 °F *significant figures for temperature- the converted number has the same number of decimal places as the original temperature C. Metric Prefixes (table 1.2, page 10) 1. Kilo- 1000 or 10^3 2. Deci- 1/10 or 10^-1 3. Centi- 1/100 or 10^-2 4. Milli- 1/1000 or 10^-3 5. Micro- 1/1000000 or 10^-6
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