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CSU - CHEM 111 - chem111 - Study Guide

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CSU - CHEM 111 - chem111 - Study Guide

School: Colorado State University
Department: Chemistry
Course: General Chemistry I
Professor: Ruth Tucker
Term: Summer 2016
Tags: Chemistry
Name: chem111
Description: final study guide
Uploaded: 05/08/2018
0 5 3 9 Reviews
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background image SI Units, Pre fixes, uncertainty in measurements problem 
solving 
  
SI Units and prefixes  1 nanometer (nm)  10 ^-9m  1 micrometer  10^-6m  1 millimeter  10^-3m  1 centimeter  10^2m  1 kilometer  10^3m  1 megameter  10^6m  1 cm^3  1mL     Conversions  1. 355mL coke can: how many L?  1. .355mL X 10^-3L  1. 0.355L  2. What is the mass in g of an object that weights 325ng?  1. 325ng X(1g/10^-9ng)  1. The ng get canceled out and your left with 3.25g X10^-7     Uncertainty in measurements  Precision  VS.  Accuracy  -how close repeated measurements are 
to each other 
   ○ How close the experimental  measurements to real value  *Estimate the last digit* 
  
Significant figures (SF)     ● All digits in a measurement are significant  EXCEPT  for zeros needed to hold point in place.  ○ 0.00438nm ( has 3 SF's because the three zeros are holding the places) 
○ 3.20 (3SF) the zero counts in this instance 
○ 6500 (2SF)  you assume the place holders are the 2 zeros so they do not count 
background image    Calculations with Sig Figs  Multiplication and division  ○ Answer has same # of sig figs as measurements with fewest Sig Figs  ■ EX. Density= mass\volume  ■ 2.5 mL of substance, mass 3.8056 g 
■ 3.8056g\2.5 mL=1.522g\mL ( only 2 sig figs because the 2.5only has 2 sig 
figs)  ● Addition and subtraction  ○ The answer has the same decimal place as measurement with fewest decimal place    83.5 mL 

   23.281ml 
106.7 ​81mL  ● There are only 4 sig figs because the decimal places only line up to the tens place. 
● Exact numbers has an infinite number of SF’s 
1.Name binary molecular compounds and write their formulas  ● Molecular or covalent compounds composed of two nonmetal elements    Number  Prefix    Number  Prefix  1 (sometimes omitted)  mono-    hexa-  di-  hepta-  tri-  octa-  tetra-  nona-  penta-  10  deca- 
background image   Compound  Name    Compound  Name  SO 2   sulfur dioxide    BCl 3   boron trichloride  SO 3   sulfur trioxide  SF 6   sulfur hexafluoride  NO 2   nitrogen dioxide  PF 5   phosphorus pentafluoride  N 2 O 4   dinitrogen tetroxide  P 4 O 10   tetraphosphorus decaoxide  N 2 O 5   dinitrogen pentoxide  IF 7   iodine heptafluoride  2.Name binary ionic compounds and ionic compounds containing polyatomic ions  ● Ionic compounds are composed of a cations followed by an anion. Which is a metal and  nonmetal     Names of Some Ionic Compounds  NaCl, sodium chloride  Na 2 O, sodium oxide  KBr, potassium bromide  CdS, cadmium sulfide  CaI 2 , calcium iodide  Mg 3 N 2 , magnesium nitride  CsF, cesium fluoride  Ca 3 P 2 , calcium phosphide 
background image LiCl, lithium chloride  Al 4 C 3 , aluminum carbide  Polyatomic ionic compounds     KC 2 H 3 O 2 , potassium acetate  NH 4 Cl, ammonium chloride  NaHCO 3 , sodium bicarbonate  CaSO 4 , calcium sulfate  Al 2 (CO 3 ) 3 , aluminum carbonate  Mg 3 (PO 4 ) 2 , magnesium phosphate  Transitional metal ionic compounds containing two or more cations with variable charges     Names of Some Transition Metal Ionic Compounds  Transition Metal Ionic Compound  Name  FeCl 3   iron(III) chloride  Hg 2 mercury(I) oxide  HgO  mercury(II) oxide  Cu 3 (PO 4 ) 2   copper(II) phosphate     Determine the formal charges of atoms in Lewis structures 

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School: Colorado State University
Department: Chemistry
Course: General Chemistry I
Professor: Ruth Tucker
Term: Summer 2016
Tags: Chemistry
Name: chem111
Description: final study guide
Uploaded: 05/08/2018
17 Pages 82 Views 65 Unlocks
  • Better Grades Guarantee
  • 24/7 Homework help
  • Notes, Study Guides, Flashcards + More!
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