Chem Spring 2008 - page 5

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   kristi1111
    Thanks for the "Z" scale for metric conversions. I am going to write this down and study it for my first quiz on Tuesday.
  2. by   NXS
    Great website to refresh on chemistry concepts, good easy method of explaining each key concepts and includes examples and such. I used it few years back but i think it'll help.

    http://www.chemreview.net/
  3. by   RNWannaBe724
    I am taking Intro to Chem right now and have only had one class and am already discouraged. We started in with conversions, and I am already lost. Can anyone help me with these?
    Conversions meaning... 300m is ? km. but you have to do all the work for it and use fractions and stuff. I am SO LOST!
  4. by   itsa307
    Quote from RNWannaBe724
    I am taking Intro to Chem right now and have only had one class and am already discouraged. We started in with conversions, and I am already lost. Can anyone help me with these?
    Conversions meaning... 300m is ? km. but you have to do all the work for it and use fractions and stuff. I am SO LOST!
    This is what we are doing too and I'm not sure if it'll help but I'm making notecards. I have them divided into length, weight, mass, volume... I know this is going to be hard but I'm determined to master one chapter at a time. Also my teacher has offered help before class and thru email. You might want to ask yours. I've been told by other just don't get behind. My school also offers free tutoring, you may want to check to see what yours offers. Hang in there!
  5. by   AlishiaRN77
    Quote from RNWannaBe724
    I am taking Intro to Chem right now and have only had one class and am already discouraged. We started in with conversions, and I am already lost. Can anyone help me with these?
    Conversions meaning... 300m is ? km. but you have to do all the work for it and use fractions and stuff. I am SO LOST!

    Hopefully this will help....please refer to the Z scale on top to help.

    300m = ______km

    300m x __1km = 300 divided by 1000m = 0.3km
    --------1000m

    I don't know if you use significant figures as well......

    300m has only 1 sig fig...thus your answer will be 0.3km

    another example:

    How many tablespoons are in 15 teaspoons (1 tablespoon = 3 teaspoons)

    your given is the 15 teaspoons, which equals 2 sig figs. (1 and 5)

    15 teaspoons x 1 tablespoon = 15 divded by 3 = 5 tablespoons
    ---------------3 teaspoons

    but keep in mind that you need 2 sig figs....so your answer will be: 5.0 tablespoons.

    another example:

    How many nickels are in $2.75? (There are 3 sig figs in this answer)

    1. You know that 4 quarters equals $1.00
    2. You know that 5 nickels equals a quarter

    So your rations for the above are: 4 quarters = $1.00
    -----------------------------------$1.00 -----4 quarters

    5 nickels = 1 quarter
    1 quarter ---5 nickels

    The given in the question is $2.75

    So start out with 2.75 dollars x 4 quarters x 5 nickels =
    ------------------------------1.00 dollar ---1 quarter

    The dollars and quarters cancel out...leaving you with an answer in nickels.

    So multiply the top numbers: 2.75 x 4 x 5 = 55
    Then multiply the bottom numbers: 1.00 x 1 = 1.00

    Then divide 55 by 1.00 = you get 55 nickels. (your final answer)

    I hope that made sense.
    Last edit by AlishiaRN77 on Jan 26, '08
  6. by   jorhyne
    wrong thread
  7. by   Hanabna
    allieinaz you rock! Thanks for the help! You're 1,000 times better than my Chem teacher!
  8. by   AlishiaRN77
    Hanabna -I'm glad to hear that it helped. I know that the conversions can get tricky and you'll need to know how to do all this before getting into molarity, density, percent solution, and dilutions. I had to learn these quickly because we began going over them in biology.....ugh!! But...good news, i'll be ready when we start doing them for Chemistry.

    It has really helped using the Cliff study solver for Chemistry. Makes Chemistry sooooo much easier.

    Let me know if you have any other questions...i'll try and answer the easiest way possible...of course this will have to be after i learn it the easiest way possible..lol.

    Have a great day all!!
  9. by   stackbundles
    Quote from kristi1111
    Thanks for the "Z" scale for metric conversions. I am going to write this down and study it for my first quiz on Tuesday.
    let me guess, reedy, delta college
  10. by   AlishiaRN77
    I'm a little nervous right now....have my first chem exam tomorrow night. I just took a nap so that I could be up half the night tonight to study for the exam......(biting nails).

    I really like this class so far and want to get an A on it...
    Wish me luck!!
  11. by   itsa307
    Quote from allieinaz
    I'm a little nervous right now....have my first chem exam tomorrow night. I just took a nap so that I could be up half the night tonight to study for the exam......(biting nails).

    I really like this class so far and want to get an A on it...
    Wish me luck!!
    GOOD LUCK! I know this is going to be a hard class for me but I'm hoping if I do everything I'm supposed to that I'll get an A too. I have my first lab tonight and my first quiz on Mon. I've been studying as much as I can with 2 little ones and a part time job. Hopefully some of this is absorbing into my brain!
  12. by   AlishiaRN77
    Ok...so the test is over.......(heart rate and breathing has returned to normal - and my nails still exsist..lol).

    The test was ok. I think I did alright..will let you all know. I actually took till the end of the class to make sure I answered the questions correctly.....ya know review all the questions before leaving...

    We had a question on the scientific method where we had to write out each step and define what each step meant...pretty easy right? I just about had a heart attack because that was when my brain went blank!:angryfire

    I retraced back to checking again and by the time I got back to that questions...whew...it was back..lol.
    We also had conversions, density, volume, metric system, calculations, etc on the exam. That's about all I could remember.

    Anyway, just wanted to let you all know how it went and what type of questions were being asked on the first exam.
  13. by   Annieee
    Quote from allieinaz
    Ok...so the test is over.......(heart rate and breathing has returned to normal - and my nails still exsist..lol).

    The test was ok. I think I did alright..will let you all know. I actually took till the end of the class to make sure I answered the questions correctly.....ya know review all the questions before leaving...

    We had a question on the scientific method where we had to write out each step and define what each step meant...pretty easy right? I just about had a heart attack because that was when my brain went blank!:angryfire

    I retraced back to checking again and by the time I got back to that questions...whew...it was back..lol.
    We also had conversions, density, volume, metric system, calculations, etc on the exam. That's about all I could remember.

    Anyway, just wanted to let you all know how it went and what type of questions were being asked on the first exam.

    You must be glad it's over! I've been cramming for my test coming up on Tuesday Let us know how you did!


    Also - I had a question for anybody - I'm having problems balancing equations quickly. I can do them, but with trouble and it takes awhile. Well, I only have 1hr and 30min to do the chapter 1, 2, and 3 test on Tuesday and I have to learn how to balance quicker! Does anyone have anything they use that works well?

    Thanks!

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