Chem Spring 2008 - page 19

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   itsa307
    I finish up Chemistry next week! My comprehensive final is on Monday and I have to get a 86/87 on it to get my B back since I bombed on the last exam. My class started out with 21 students, we're now down to 13 and half failed the last exam, then 1 D, 1 C, 1 B, and 3 A's. My teacher is not the greatest so I can't wait to move onto a different class and be done with this one!
  2. by   BusyMomof5
    Good luck itsa, you can do it!! Here's some good luck for you
    :wshgrt::wshgrt:
  3. by   foxymom
    Hi Im a newbie. I'm wondering is BIOCHEM really difficult? I'm really nervous I'm not good in Chemistry back in high school. Can you please enlighten me, this fear is stopping me to reach my goal.
    I don't know how other moms did it.
  4. by   Hotflashn
    Quote from foxymom
    Hi Im a newbie. I'm wondering is BIOCHEM really difficult? I'm really nervous I'm not good in Chemistry back in high school. Can you please enlighten me, this fear is stopping me to reach my goal.
    I don't know how other moms did it.
    It is hard, but it is different. Definitely there is some revisiting of the concepts of general chemistry, but not the math. There is a lot of memorization, and structures and reactions. There are so many steps to everything, and different ways to write it - different symbols meaning the same thing - like language. It often builds on itself though, that helps. It is interesting, that helps, too, I think.

    Don't let the fear of it prevent you from reaching your goal, or taking that step. It won't eat you. Stand up to it! Review your general chem concepts (understand polarity, acid-base reactions, and bonding if nothing else!) then make sure you check ratemyprofessor.com and get the background on the potential instructor, ask around and see who is good, if possible. Get a tutor early and go often, join a study group, do the homework. If you are really concerned, stressed or strapped for time, don't take any other classes, at least not demanding ones. Avoid summer or short sessions. Tape the lectures. Ask for help. Mostly though, just commit to doing it. Challenge yourself and go for it!

    Good luck!
  5. by   hearts895, RN BSN
    Hi everyone! I really need some help or tips - any help - with balancing equations and anything to do with the mole and all its conversions and empirical formulas. I have a quiz this Monday on these subjects and I have a feeling I did pretty bad on my last test and I really want to get at least an A- in this class (so every quiz counts). Any help or advice would be soo appreciated - you all have been such a blessing! Thanks everyone! :heartbeat
  6. by   Anne36
    Hi, has this turned into a fall/2008? yet

    Im taking chemistry 1000 an intro class at OCC.
  7. by   msdeannah
    Hi, Anne 36 here is the link for the fall thread. Come on in and study away.
    http://allnurses.com/forums/f198/che...318782-13.html
  8. by   nursingstudent29
    Hello everyone,
    I will be taking chemistry 1 and 2 summer of 2009. Originally, I was planning to take the course this fall but due to my trip outside the country i couldn't make it. So, I was wondering how hard is the the course? I want to know this ahead of time so i can make changes or not take it on the summer time. I will be taking chem 1 on summer 1 and chem 2 on summer 2. I know that summer classes are so intense because of the time. Do you guys think it's feasible to take this chem. 1 & 2 on the summer?
  9. by   hearts895, RN BSN
    Quote from nursingstudent29
    Hello everyone,
    I will be taking chemistry 1 and 2 summer of 2009. Originally, I was planning to take the course this fall but due to my trip outside the country i couldn't make it. So, I was wondering how hard is the the course? I want to know this ahead of time so i can make changes or not take it on the summer time. I will be taking chem 1 on summer 1 and chem 2 on summer 2. I know that summer classes are so intense because of the time. Do you guys think it's feasible to take this chem. 1 & 2 on the summer?
    Honestly, if you are new at Chem. you should NOT take it in the summer! Its a pretty tough course, so I'd take it during a regular quarter (especially if you want/need an A). Good luck!
  10. by   brismama
    need help with limiting reagents. the book i have sucks and i cant seem to find any online websites that explain it pretty well. but i did try. can someone who understands it please let me know if this is right?

    q: if 20 grams of hydrogen reacts with 48 g of nitrogen to produce 15 grams of ammonia (nh3). (note: write a balanced equation before you proceed) 3h2 + n2 2nh3
    what is the limiting reagent? nitrogen (see the workout below)
    moles of h2- 3.307
    moles of n2 - 1.71
    what is the theoretical yield of the product in moles and grams?
    1.713 mol n2 x 28.020 g n2/1 mol n2 = 47.998 gn2
    what is the percent yield?
    30g/47.998 g =.625 x 100% = 62.50%





    any help is greatly greatly appreciated!!!
  11. by   CuriousMe
    Quote from brismama
    need help with limiting reagents. the book i have sucks and i cant seem to find any online websites that explain it pretty well. but i did try. can someone who understands it please let me know if this is right?

    q: if 20 grams of hydrogen reacts with 48 g of nitrogen to produce 15 grams of ammonia (nh3). (note: write a balanced equation before you proceed) 3h2 + n2 2nh3
    what is the limiting reagent? nitrogen (see the workout below)
    moles of h2- 3.307
    moles of n2 – 1.71
    what is the theoretical yield of the product in moles and grams?
    1.713 mol n2 x 28.020 g n2/1 mol n2 = 47.998 gn2
    what is the percent yield?
    30g/47.998 g =.625 x 100% = 62.50%

    any help is greatly greatly appreciated!!!
    ok, i confess i didn't do the math. but what you need to do is to start with 15 grams of amonia and then do the stoichiometry to figure out how much of h you start with, then do the whole thing again to find out how much n you start with. whichever of these numbers is smaller is your limiting reagent.

    my chem teacher explained in terms of painting a room. when you paint a room...you stop when one of two things happen...you run out of paint or you run out of wall. whichever you run out of first is the limiting reagent. so even if you finish the walls, and have two gallons of paint left...you won't keep painting right? so, if you start the stoichiometry with the product, do it separately with each reagent and make sure to use the coefficients from the balanced equation...the smallest answer is the limiting reagent. did that help at all?

    peace,
    curiousme
    Last edit by CuriousMe on Oct 10, '08
  12. by   AtomicWoman
    Umm, no offense, but it's not a good idea to start with the 15 grams of ammonia.

    Brismama, I posted an answer to your question in the other chemistry forum. I also posted a link with some helpful explanation of limiting reagent calculations. Best of luck!
  13. by   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

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