chem 1152 notes
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Chemistry
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Chemistry Formulas And Periodic Table
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MCAT Chemistry Equation Sheet We?ve helped over 50,000 students get better grades since 1999! ORBITALS AND ELECTRONS Quantum numbers descriptions Quantum number Description Possible values Principal quantum number (n) energy level n=1, 2, 3?. Angular momentum quantum number (l) orbital shape (s, p, d, f) l = 0, to ?n- 1 Magnetic quantum number (m) orbital orientation (px, py, pz) m = -l to +l Spin quantum number (ms) describes spin of electron ms = + ? or - ? Each electron has a unique set of quantum numbers. ELECTRONIC CONFIGURATION Electron configuration: describes the location of all of the electrons in an element. e.g. Carbon = 1s22s22p2 Heisenberg Uncertainty Principle: the
Lab
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Mohamed Shalan Chemistry Lab Mole Relationships in Chemical Reactions Objectives: React known mass of NaHCO3 with excess HCl Calculate the mole relationship between NaHCO3 and the solid product, NaCl Produce balanced equation for the reaction Determine whether your results support the law of conservation of mass-energy Table 1 Mass of empty evaporating dish 99.79 g Mass of evaporating dish + NaHCO3 102.38 g Mass of NaHCO3 2.59 g Mass of evaporating dish + NaCl 101.55 g Mass of NaCl 1.76 g Balanced Equation: NaHCO3 + HCl CO2 + H2O + NaCl 2.59 g NaHCO3 x 1 mol NaHCO3 x 1 mol NaCl x 58.49 g NaCl = 1.80 g NaCl 84.01 g NaHCO3 1 mol NaCHO3 1 mol NaCl 1.76 g NaCl x 100 = 98.3% percent yield 1.80 g NaCl Conclusion:
Notes
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Density Formula
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Chemistry Review Test
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?MANHATTAN HIGH SCHOOL FOR GIRLS CHEMISTRY 10?MRS. FROM Name:________________________________________________________________________ Midterm-January 2010 INSTRUCTIONS: This exam consists of three parts. Part I consists of 25 multiple choice questions, to be answered on the scantron, worth 5 points each. Part II consists of 6/8 short answer questions to be answered on the exam booklet in the space provided. Answer 6 questions only. Part III consists of the two articles which you have already been assigned to read, ?Chemiluminescence? and ?Ensuring the Validity of Data.? They are reprinted here. Each article has two essays associated with it, worth 10 points each. You must answer one essay for each article on the lined paper provided.
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types of rnx
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combination
A + B ---> AB
single replacement
A + BC----> AC + B
Decomposition
AB----> A + B
Double Replacement
AB + CD ----> AD + CB
Molarity
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the formula for finding moles is 6^23 X 10
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