Chem Spring 2008 - page 20

Hi all, Hoping to start a Chem study group for Spring 2008. I do not begin class until January 15th but figured I would see about getting a group together as soon as possible.... Read More

  1. by   PreRN Katie
    Quote from Dr. Gregory Simpson
    Hi All,

    I would love to join your group to help you through. My students just completed their second general chemistry exam and most did well. We will be tackling chemical equations, redox reactions and molar mass calculations this week.

    And for those of you planning to start chemistry in the spring, just remember, if you approach the subject positively, you will get far more out of it!

    Gregory Simpson
    That would be wonderful! Thank you so much!!!
  2. by   Freshstart2010
    Quote from tmcdaniel
    I start Intro Chem on Jan 14 so count me in.

    I am taking it and Micro all on the computer as distance courses through my community college and using a home lab kit. This could either be a really good or really bad idea. I am hoping for the best though.
    I was considering the same. I have a 3 and 6 yr old and was wondering how your online course is going? Was it a good idea and do you have someone to ask questions to? Are you able to do it at your own pace or no?
  3. by   Freshstart2010
    Quote from allieinaz
    you're very welcome. i'm really glad that you think it will be helpful. i use mine all the time to help me through the chapters and prepare for exams. i wish you the best!! :wink2:



    so, at class tonight we began going over stoichiometry...i may have spelt that wrong and also word problems. the suggestion that my instructor gave above really helped me to look through the problems and be able to solve them quite easily.

    here are some examples.....

    mol to mol (typically this is a 1 step problem)

    how many moles of sodium will react with water to produce 4.0 mol of hydrogen in the following reactions?

    2na + 2h2 ---------> 2naoh + h2

    1st - what's the given? 4.0 mol of hydrogen
    2nd - what are they asking for? moles of sodium (na)

    start off with your given:
    4.0 mol h2 x 2 mol of na = 8.0 mol of na
    .................... 2 mol of h2

    when you look at the fraction of 2 mol of na and 2 mol of h2 - this is the mole ration. using the coefficients from the equations allows me to see what the mole ratio is for the problem...thus giving us 8.0 mol of na.


    2. mol to mass (typically a 2 step problem)

    phosphorus burns in air to produce a phosphorus oxide in the following reactioin.

    4p + 5 o2 ---------> p4o10 (p small 4, o small 10)

    what mass of phosphorus will be needed to produce 3.25 mol of p4o10?

    given: 3.25 mol p4o10
    looking for? mass (in grams) of phosphorus.

    3.25 mol p4o10 x 4 mol p x 31 g p = 403 g p
    .......................... 1 mol p4o10.......1mol p


    hopefully the above helps a little for anyone. there are two other types of equations as well.... mass to mol and mass to mass. let me know if you need other help let me know. :wink2:
    i'm considering going to school for nursing. i'm 37 and a mother of 2 and want to do something for me. it's been yrs since i was n school and i don't have any clue about the prereq. i don't want this to hender me, but i wonder if there is a way i can study up on the subjects i need before i join school or should i just bite the bullet? the math equasion you just gave looks foreign to me and i couldn't make any since of it. now i'm wondering if i should even go to school. what are some ways you retained your information?
  4. by   lolaoguntade
    hello this is the answer to my prayers!!!!!!!!!!!! i am taking general chem two for spring ....NOT LOOKIG FOWARD TO IT..... i took the first one 3 years ago and got a C+ ...it was the worst semester ever. I am looking gorward to this group thanks.
  5. by   shimere
    Hi everyone starting chem 1032 in jan,i took chem about 15 years ago so i need help>>>>>>>>>
  6. by   RescueGrrl211
    Hey everyone! I want to join! My name is CJ, Im 23 and a stay at home mom/full time student. I took Chemistry my first semester in college and dropped it, I was sure I was going to fail it. So here I am, a year and a half later and a bundle of nerves to try again!

    Has anyone bought something to get a head start with? I was thinking of buying the Chemistry to Dummies book, since my college wont let us buy our books until Jan. 5th. I figure I might as well get a head start!

    Wishing you all a great semester!
  7. by   nikki.p
    Anyone taking organic bio chem??? (Spring 2009)
  8. by   daisyfleur70
    Hi, this thread is soooo long, I apologize if my question is repetitive...

    Does anyone have any helpful weblinks or suggestions for remembering electronic configurations? I do ok until I get to the higher shells and the subshells start to skip around... for example, between the 3d and 3f subshells, the next electrons fill the 4s subshell... I start getting confused at that point. Also, any additonal info on the electron dot/Lewis structures would be great!

    Thanks in advance!
  9. by   CuteBabi08
    Hey Everybody.
    I'm in my second semester of college and I have Chem this semester...

    Took my first exam and bombed

    I still have time to turn it around, everyone I talked to who had the class last semester said they all failed the first exam and they ended up getting a 3.0

    They even said I did "fairly good" (If still failing the exam is "fairly good" ) considering...
  10. by   Cilantrophobe
    Quote from daisyfleur70
    Hi, this thread is soooo long, I apologize if my question is repetitive...

    Does anyone have any helpful weblinks or suggestions for remembering electronic configurations? I do ok until I get to the higher shells and the subshells start to skip around... for example, between the 3d and 3f subshells, the next electrons fill the 4s subshell... I start getting confused at that point. Also, any additonal info on the electron dot/Lewis structures would be great!

    Thanks in advance!
    Let me know if you got your answer. The answer is right on the periodic table of the elements! We always have one on the wall in our classroom, even during tests, and it makes a world of difference if you know how to read the arrangement. In the meantime I will try to see if I can find a site that explains it. There are a few mnemonics for it, and that is only one way. Did you check your text book? It looks like a pyramid with lines drawn through it.
    Last edit by Cilantrophobe on Feb 9, '09
  11. by   Cilantrophobe
    Quote from daisyfleur70
    Does anyone have any helpful weblinks or suggestions for remembering electronic configurations? I do ok until I get to the higher shells and the subshells start to skip around... for example, between the 3d and 3f subshells, the next electrons fill the 4s subshell... I start getting confused at that point. Also, any additonal info on the electron dot/Lewis structures would be great!

    Thanks in advance!
    Go Here: http://www.webelements.com/

    The first group (Hydrogen and Helium) are the 1s2, the next group and every group after that corresponds as follows blue's are s2, orange is p6, pink is d10, and green is f14. If you can memorize that then all you have to memorize from there is the shell number (1,2,2,3,3,4,3,4,5,4,5,6,4,5,6,7,5,6,7).

    I hope that helps at a little bit.
  12. by   la mama 310
    Just started Intro to Chem (Chem 60 ) at West L.A., any reason why I should
    take Fundamentals of Chem instead ...... Do some colleges prefer it to chem 60?

    Thanks!
  13. by   Soon2BRN1980
    Any Summer Chemistry 1406 Takers, who want to start a study group?

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