Lec5 - Announcements OWL help sessions in OWL Computer Lab...

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Announcements OWL help sessions in OWL Computer Lab (CHM3222) through February 15 Dr. Johnson’s office hours: W & Th 1-2pm in CHM1102A Greg Beachley’s office hours: W 4-5 pm in CHM1115
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Fundamentals of General Chemistry CHEM131:13xx Spring 2008 Dr. S. Johnson Instructor Mr. Greg Beachley Teaching Assistant Tuesday and Thursday, 3:30-4:45 pm , CHM1402
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Assignments Read: (Ch 1 ,2, 3, 4.1-4.2) for Thursday read Chap. 4.3-4.5 WHW for Discussion Class: WHW2 problems (in Blackboard/Written Homework): Chapter 2: 29, 31, 43, 47, 61 Chapter 3: 5, 7, 13, 15, 19, 21, 25, 27, 29, 31, 39, 33, OWL HW2 (Ch 3&4): due 8 am, Mon. 2/18 OWL HW1 extended to Thursday 1/14, 8 am Bring clicker, calculator, and periodic table to lecture
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OWL CH 3 COOH CH_3_COOH CH 3 CO 2 H CH_3_CO_2_H HC 2 H 3 O 2 HC_2_H_3_O_2_ CH 3 COO - CH_3_COO^-^ CH3CO2- CH_3_CO_2_^-^ C 2 H 3 O 2 - C_2_H_3_O_2_^-^ Subscripting _3_ Superscripting ^-^ Exponential notation 6.02E+23
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Get ready for a quick clicker check! This one does not count for points
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What is the charge on the magnesium ion? 1. +1 2. +2 3. -1 4. -2
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Get ready for a clicker question! This one counts This is one of many clicker questions. No makeups for clicker questions electronic/written Each clicker question is worth 2 points 1 point for participation and 1 point if you answer the question correctly. Keep track of your clicker points on Blackboard. The final points allotted for the clickers will be 90% of the maximum possible points, and normalized to 80 points total.
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What is the correct name for N 2 O 5 ? n itroge oxi d e ni tr og (I I) o x i de tro g (V ) o di itr pe nto id 0% 0% 0% 0% 1. nitrogen oxide 2. nitrogen(II) oxide 3. nitrogen(V) oxide 4. dinitrogen pentoxide 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 10
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How many atoms of O are there in 1 mole of calcium phosphate? 6.0 22 x 1 02 3 1.20 4 x 023 2 .409 x 1 0 24 4.81 8 0% 0% 0% 0% 1. 6.022 x 10 23 2. 1.204 x 10 23 3. 2.409 x 10 24 4. 4.818 x 10 24 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 10
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Weighted atomic mass calculation
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Lecture Class 5 Outline associated with OWL HW2 & WHW2 Ch 3.5-3.7, 4.1-4.2 Conversions between moles, mass, numbers of molecules and atoms (3.5) Formulas and percent composition (3.6) Hydrated compounds (3.7) Chemical equations (4.1) Balancing chemical equations (4.2)
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molar mass of a compound = sum of the atomic masses of each individual atom in the formula = Σ (#atom in formula)(atomic mass) Molar Mass relates mass of compound to moles of compound Formula mass - ionic compound Molecular mass - molecular compound From last Lecture: (1 mol C/1 mol CH (1 mol C/1 mol CH 4 ) (12.01 g C/1 mol C) = 12.01 g C/ 1 mol CH ) (12.01 g C/1 mol C) = 12.01 g C/ 1 mol CH 4 (4 mol H/ 1mol CH (4 mol H/ 1mol CH 4 ) (1.01 g H/1 mol) = 4.04 g H/ 1 mol CH ) (1.01 g H/1 mol) = 4.04 g H/ 1 mol CH 4 TOTAL = TOTAL = molar mass = 16.05 g/mol molar mass = 16.05 g/mol NOTE: 4 SF!!
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This note was uploaded on 04/29/2008 for the course CHEM 131 taught by Professor ... during the Spring '08 term at Maryland.

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Lec5 - Announcements OWL help sessions in OWL Computer Lab...

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