Chem class notes[2]

Chem class notes[2] - ChemNotes(chapter1)...

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Chem Notes (chapter 1) 22:22 Chapter 1  Separation of Mixtures I. Filtration     : heterogeneous mixture.  II. Distillation     : Homogeneous liquid mixtures-liquids have different boiling point.  III. Extraction     : when substances are more soluble in different solvents.  (heterogeneous or homogenous mixtures) IV. Chemical reaction     : A+B--X A-Xs+B (Xs is X solid) SI System : Definition: International system of agreed upon units. Physical measurement     Mass-kilogram (kg) Length-meter (m) Time-second (s)or (sec) Temperature-Kelvin (K)       T(C)=5/9 (T(F)-32*)       T(F)=9/5 (T(C)+32*)       T(k)=T(C)+273.15 Conversion Factors : Definition: an equality (or ratio) of equal measurements in different units. a. 1inch=2.54cm b. 1km=10^3 m memorize conversions (kilo=10^3…)
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Dimensional Analysis Definition: a problem solving tool for converting units. Ex. In notes. (basically just unit conversions) Volume Definition: The measure of space occupied by an object. SI unit= 1 liter (L) 1cm^3=1mL (LxWxH)…1,000cm^3=1L Density : Definition: The mass of the substance divided by the volume of the substance I. Intensive Property     : does not depend on the amount of sample. II. Extensive Property     : depends on the amount of sample.  (ex. Heat, mass, volume) Significant Figures : All measurements have some amount of uncertainty.  Conversion Factors     : Some are exactly known Some are just very very precise. Description of Uncertainty     : Accuracy: how close is measurement to the true value? Precision: how close is measurement to other measurements? Definition: the digits in a measurement that indicate how precise that  measurement was made. 
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Metric System Prefix Table yotta  Y 1,000,000,000,000,000,000,000,000 +24 zetta  Z 1,000,000,000,000,000,000,000 +21 exa  E 1,000,000,000,000,000,000 +18 peta  P 1,000,000,000,000,000 +15 tera  T 1,000,000,000,000 +12 giga  G 1,000,000,000 +9 mega  M 1,000,000 +6 kilo  k 1,000 +3 hecto  h 100 +2 deka  da 10 +1 deci  d 0.1 -1 centi  c 0.01 -2 milli  m 0.001 -3 micro  µ 0.000,001 -6 nano  n 0.000,000,001 -9 pico  p 0.000,000,000,001 -12 femto  f 0,000,000,000,000,001 -15 atto  a 0,000,000,000,000,000,001 -18 zepto  z 0,000,000,000,000,000,000,001 -21 yocto  y 0,000,000,000,000,000,000,000,001 -24
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Chem Class Notes (chapters 1+2) 22:22 Significant Figures (cnt.):
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Chem Class Notes (chapters 1+2) 22:22 Rules: all non zero digits are significant Leading zeros are never significant (ex. 0.001234=4 sig figs) Trailing zeros are significant if they are to the right of the decimal place. (ex. 
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This note was uploaded on 04/08/2010 for the course CHEMISTRY 1234 taught by Professor Kroner during the Spring '08 term at Ohio State.

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Chem class notes[2] - ChemNotes(chapter1)...

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