chemistry*141* - michigan state university · cem 141 sections 01 - 56 fall 2014 we’ll be using...
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Chemistry 141
Professor James F Harrison [email protected]
Office Hours
1:30-‐2:30 pm MWF Room 37
Chemistry Basement
CEM 141 Grade Summary -‐ FALL 2013
GRADE # of Students % of Students
4.0 446 22.1%
3.5 299 14.8%
3.0 314 15.5%
2.5 273 13.5%
2.0 202 10.0%
1.5 170 8.42%
1.0 116 5.74%
0.0 (with final) 140 6.93%
0.0 (no final) 57 2.82%
75.9% of the students in the fall earned a grade of 2.0 or higher!
Course Structure
Lectures MWF 3:00 – 3:50 pm room 138
RecitaOon once a week Room and Ome depends on your secOon
If you are in this lecture you are in a secOon between 29 and 42
RecitaOons Weekly
Staffed by a Teaching Assistant (TA)
Opportunity to ask quesOons and discuss the lecture material
Will start Tuesday , September 2
You will receive credit for problem sets a_empted in recitaOon
There will be 13 sets but only 10 will be counted
and each of those will be worth 5 points
Maximum 50 points
Help Room
Help with the material covered in CEM
141 is available in the Help Room
(Room 83 in the basement)
Staffed by TA’s
Free tutoring
is available at the Learning Resource Center
in Bessey Hall
and in several residence halls on campus
LRC.msu.edu
Mock exams
Useful InformaOon
General Chemistry Office
General informaOon and assistance Room 185 M-‐F 8-‐12 noon and 1-‐5 pm
Telephone 5-‐9715 ext 323 General Chemistry Coordinator Mrs. Wendy Whibord
Undergraduate Program Manager Dr. Steve Poulios
Previous Examinations
A book of examinations given previously in CEM 141 is available for $20 from the
General Chemistry Office (room 185 Chemistry) or from bookstores in town.
The book contains all of the exams, and solutions to the exams, given in the last five years.
This is the best purchase you can make
CEM 141 web site
h_p://www.chemistry.msu.edu
Go to Courses ( upper right)
then
General Chemistry Courses
then
CEM 141
cemscores
You will be able to view your points for the various exams, homework
and recitaOon work
CEM 141 Sections 01 - 56 Fall 2014 We’ll be using OWL (Online Web Learning) as our online homework system this semester. You will need to use OWL in order to get credit for your homework. Here are your directions to get access:
1. Purchase your OWL access code. There are several ways to get the access code: a) Purchased separately or bundled with the Atwood Survival Guide for General Chemistry from local
bookstores b) Purchased from CengageBrain website:
24-month access for $50: http://www.cengagebrain.com/micro/1-1PLTZJB 6-month access for $42: http://www.cengagebrain.com/micro/1-1PLU45F
!2. Open a web browser on your computer and go to www.cengage.com/owl 3. Choose General Chemistry It is recommended that
and choose Register you do NOT click here to purchase an access code. It is cheaper and quicker to purchase one as described in step #1 above.
4. Choose:
Chemistry &Chemical Reactivity, 8th Edition; Kotz, Treichel, Townsend
ISBN 0-840-04828-9 (5th book from the top) Note that this is not the same text that is used to accompany lecture!
5. Choose: Michigan State University - East Lansing, Michigan
6. Click on the blue arrow under Student Registration
7. Choose the blue arrow next to Chemistry 141 Fall 2014.
Enter your information into the Self-Registration form. Your Student Number is your MSU PID. Enter your PID as the letter A followed by 8 digits (no spaces). Type your access code into the Access Code space and press Continue.
!Once you reach the “Student Registration: Successful Registration” page, click on the Login Page link at the top. Bookmark this login page and use it whenever you visit OWL. Use the Login and Password you created during registering.
Homework assignments will be administered by OWL@ system
First OWL homework opened this morning and is due by 8:00am Saturday September 6
OWL homework opens on Wednesday at 8:00am and is due 10 days la_er on a Saturday at 8:00am
Homework (OWL)
Eleven homework assignments will be issued this term
There are no make up or extensions offered for missed problem sets.
You are encouraged to work together But you are responsible for compleOng your own set by
Saturday morning at 8:00 am Due dates are listed on the course calendar
You may earn 160 points or 16% of the total points available
You have an unlimited number of try’s on each quesOon
Examinations
Three one hour exams Monday evenings 6:45-7:45 pm
If for some reason you cannot take the evening
exam you may take an alternate exam at 6:45 am on the same day as the evening exam
There will not be any makeup exams
Final Exam
There will be a 2 hour final examinaOon scheduled from 7:45 – 9:45 am on
Tuesday December 9
If you miss the final exam you will receive a zero for the course
Absence from an exam due to illness must be substantiated by a physician. Absence due to
extenuating circumstances must be preapproved.
If you miss one hourly exam you will receive a
grade for that exam equal to the arithmetic average of the two remaining hourly exams or
the final, whichever is lowest. If you miss more than one hourly exam you will
receive a grade of zero for that exam.
Points 3 hourly exams (180 each) 540 1 final exam 250 11 problem sets (OWL) 160 10 recitation problems 50 Total points 1000
Grades
1000-800 4.0 799-740 3.5 739-680 3.0 679-620 2.5 619-560 2.0 559-500 1.5 499-440 1.0 439-0 0.0
Scale is fixed and will not be curved
exam date :me 1 September 22 6:45-‐7:45 pm
2 October 20 6:45-‐7:45 pm
3 November 17 6:45-‐7:45 pm
final December 9 7:45-‐9:45 am
ExaminaOon Schedule
General Chemistry Awards
Three awards will be given to the top three students in CEM141
First award $500
Second award $300
Third award $200
www2.chemistry.msu.edu/courses/cem141jo
Most of the power point slides from my lectures will be available at
The best way to contact me is by email and the best address is
Please use cem141 in the subject line
Lecture Notes 1
Units of measurements, calculaOons
When we report a measurement we report Number Unit
Units of Measurements
ReporOng the measurement of a quanOty without giving its unit is meaningless
For example saying that the length of a race is 3 means nothing without the associated unit, say km or miles
There are many different units for the same property
Length could be angstroms, cenOmeters, meters, inches, feet, miles, light years, etc
mass kilogram kg
length meter m
Ome second s
temperature Kelvin K
amount mole mol
current ampere A
SI units
EssenOally all science and engineering use the System InternaOonal or SI system
Base SI Units Quan:ty unit symbol Mass kilogram kg Length meter m Time second s Temperature degree K Amount mole mol Current ampere A
Common derived units:
velocity = length / time = m s−1
acceleration = velocity / time = ms−2
force = mass x acceleration = kg m s−2 = Newton ≡ N
Energy = Force x distance = Nm = kg m2 s-2 = Joule ≡ J
pressure = force / area = N /m2 = kg m-1 s-2 = Pascal = Pa
frequency = 1 / time = s-1 = Hertz = Hz
Oqen powers of 10 are represented by a prefix
prefix Value pico (p) 10-‐12
micro (μ) 10-‐6
milli (m) 10-‐3
kilo (k) 103
mega (M) 106
7.0 picometers 7.0pm 7.0 x 10-‐12 m
8.6 micrometers 8.6μm 8.6 x 10-‐6 m
12.6 kilometers 12.6km 12.6 x 103 m
Significant figures
How many significant figures are in a number?
1. If there is a decimal point in the number, draw an arrow from leq to right unOl you come to the first non-‐zero digit. All digits you did not draw through are significant.
7532.03
0.004830
6 significant figures
4 significant figures
2. If there is no decimal point in the number draw an arrow from right to leq unOl you come to the first nonzero digit. All digits you did not draw through
are significant. However this is the minimum number of significant figures in the number. You cant tell about the zeros unless the number is wri_en in
scienOfic notaOon.
97300 At least 3 significant figures Perhaps 5
ScienOfic NotaOon
Represent numbers as a number between 1.000… and 9.999… mulOplied by a power of 10.
63.51
0.0271
10068
= 6.351 x 10
= 2.71 x 10-‐2
= 1.0068 x 104
7.23 = 7.23