general chemistry

  1. DoctoOcto

    Gen Chem II - Easy Prof/"Less" Learning vs. Harder Prof/"More" Learning

    I'm about to sign up for gen chem 2 for life scientists for Winter 2020, and I'm stuck between 2 choices. There's 2 sections, and one of the professors (Prof A) is the one I have Gen Chem I with currently. His exams are easy and straightforward, but he seems to skip over some things that other...
  2. orgoman22

    Dr. Romano's Summer DAT(OAT) Intensive Camp and more!

    We have space left in Dr. Romano's Summer DAT Intensive. If interested email me for more details. We also offer private tutoring for the DAT, OAT, Orgo, General Chemistry, Biochemistry, Math and more. Our instruction for private tutoring is offered in class or online. Nancy...
  3. K

    Transferring Post-Bac Programs

    Hello, This is my first post so please bear with me. I received a psychology degree from a state school and graduated with a 3.9 GPA. The last year of college I decided that I wanted to enter healthcare, specifically a doctor. I had toyed with the idea before but I think I was too emotionally...
  4. F

    gen chem

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  5. Tjharden15

    Breakdown AA: 22/TS: 23/PAT:23

    So I just took my DAT a few days ago and wanted to post something because when I was studying I didn't see many posts that struggled with the things I did (aka QR, Gen. Chem, and RC mostly) so I thought this might help those who feel less confident about the DAT leading up to it. So for study...
  6. P

    Question about EQUILIBRIUM CONSTANT!

    Question: In a sealed 1L container, 1 mole of nitrogen gas reacts with 3 moles of hydrogen gas to form 0.05 moles of NH3 at equilibrium. What is the Kc of the reaction? The balanced equation is N2 + 3H2 -> 2NH3 The solution says that we would have (1-x)M of N2 and (3-x)M of H2, to get the 0.05M...
  7. 3

    Gen. Chem II for Summer?

    Should I take General Chemistry II over the summer? I’m at a community college and plan on taking it here during the summer which is 1 month and 7 days long. Or should I take it for an entire semester instead so it won’t be too fast-paced?
  8. P

    Sulfur's valence electrons in sulfate ion

    My book (Kaplan MCAT Gen Chem pg 27) says that for the sulfur atom in the sulfate ion, sulfur's 3s and 3p subshells can only contain 8 of these 12 electrons; the other 4 electrons have entered the sulfur atom's 3d subshell, which in elemental sulfur is empty. Why did "the other 4 electrons"...
  9. P

    Question about sulfur's valence electrons in sulfate ion!!!

    My book (Kaplan MCAT Gen Chem pg 27) says that for the sulfur atom in the sulfate ion, sulfur's 3s and 3p subshells can only contain 8 of these 12 electrons; the other 4 electrons have entered the sulfur atom's 3d subshell, which in elemental sulfur is empty. Why did "the other 4 electrons"...
  10. Elvisthepelvis

    DAT Destroyer (2018 edition) - General Chemistry #226

    Hi, so I know that in orgo world ethers are nonpolar solvents and in an extraction the ether is the organic layer and polar water is the aqueous bottom layer (therefore water and ether don't mix). So I always assumed that ethers are insoluble in water. In the general chemistry section of the...
  11. dentaltab4life

    DAT Bootcamp GC Test #9 Question #2

    I was particularly confused with this question due to the fact that the answer I got when solving the problem was not one of the available choices. Why, after finding that the number of total Al2O3 atoms is ~6.02*10^21, do we multiply that number by 3 to get the number of O atoms in the...
  12. K

    Oat topic changes?

    On the 2017 OAT topics list, I don't see magnetism under Physics. Is it safe to say that I won't be seeing this topic on the test?
  13. dentaltab4life

    Physical States of elements?

    While I was studying for the General Chemistry section of the DAT, I encountered a question that requires the knowledge of elements' physical states at a certain temperature: Q: Consider the physical states of Cl2, K, W, Pb, Hg, Br2, and Sb. Which will be liquids at 25 degrees Celsius? Do I...
  14. chunkyfilms

    My General Chemistry 2 course covers some orgo?

    Hello SDN this is my very first post. I couldn't find an answer anywhere on on the site, but I remember looking up pre-reqs for for medical schools on the school websites and reading that one school did have an exception of some sort for this. I'm currently taking Gen Chem 2 and it includes...
  15. caffeine jitters

    effective nuclear charge

    Hey all, Quick question regarding the effective nuclear charge. Can't the equation for its calculation be simplified as "the number of valence electrons"? it seems that in all the examples I've seen, the effective nuclear charge is the same as the number of valence electrons. Am I just jumping...
  16. A

    AAMC Practice Test #1 Chem/Phys Section Q. 53

    Hey! I was wondering if someone could explain to me why we can assume Al (s) is more susceptible to oxidation compared to Zn (s). Thanks!
  17. gureum

    My dog ate my chem notes..

    For real. I felt so hollow inside...there was only myself to blame. But now I'm seeing this as an opportunity to rewrite them more effectively. As neat as they were, they didnt really stick with me. Any tips on how I can write good chem notes? I want to save them for college. (chem ap)
  18. R

    Why is guanidine more basic than methylamine?

    I was going through the EK Chemistry lesson, and they explained that Guanidine HNC(NH2)2 is a stronger base than methylamine, CH3NH2. I am confused by this because I assumed that the least stable compound would be the most basic. Guanidine is resonance-stabilized, which means it should be less...
  19. Dr.BabyKarott

    DAT Gen Chem--Gauche Interactions

    Hi all, I have a question that I cannot find the clear answer to anywhere. For gauche interactions on Newman projections, how do we decide which gauche interaction is more stable? I came across a problem in destroyer that asks you to select the most stable Newman projection, and one structure...
  20. futuredrummerdoctor

    Electronic Configuration

    The 4s orbital is lower in energy than the 3d orbital, and therefore you write 4s before 3d in the electronic configuration. Why, then, is the electronic configuration for Hafnium (Hf) the following? 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p64 d10 5s2 5p6 4f14 5d2 6s2 <-- Can someone please explain to...
  21. B

    Destroyer GC/Bootcamp GC/Chad's videos

    I've watched all of chad's videos and done the quizzes, thought I was doing well until I started doing destroyer GC problems....:lame: I'm now rewatching Chad's videos& redoing the quizzes but I don't feel like they are helping out much. I've also been practicing with bootcamp, which is near the...
  22. medicaldalliance

    Highly competitive pricing! TPR Gen Chem

    Hello! I'm selling The Princeton Review (TPR ) General Chemistry Review -- It is in great condition and entirely unsullied by writing. OBO! Please feel free to PM me for additional information and ask for additional photographs. P.S. The three practice exams weren't used and are still valid...
  23. P

    Lacking in the General Chemistry Department For The DAT. suggestions?

    First post here, so please cut me a little break. Long story short, I am currently taking my second semester of organic II with the lab. All my time is focused on this at the moment. I know I need to study for the DAT, and plan to within the upcoming months. My issue is, it has honestly been a...
  24. blairww

    Did Anyone Else Bomb the ACS Gen Chem I Final?

    So I know that the averages are pretty low for the ACS finals (averages of about 50%), but I thought I could at least get a C+/B without any sort of curve. I just took the ACS Gen Chem I final today and definitely failed because I couldn't finish it on time. I did manage to bubble in D's for...
  25. jmotilal

    Difficulty of General Chemistry

    Hello all, was just wondering how difficult is General Chemistry Chem 1045 at the college level , I am a high school senior taking college classes at my local CC. I've taken Chemistry honors at the high school level this past year. Earned roughly a B average throughout the course. Just sort of...
  26. P

    DAT QVault, Bootcamp, Genius Subscriptions Selling Cheap!

    Finished studying for my DAT! Selling my online subscriptions for cheap. Message me! DAT Genius: Expiring October 25, 2016. Asking $65 DAT Bootcamp: Expiring August 31st, 2016. Asking $40 DAT QVault Biology expiring October 16th, 2016. Asking $30 If you want to bundle up and purchase all...
  27. J

    DAT Destroyer Gen Chem Questions problem 28

    Im trying to understand the concept as well as math for problem 28 in the gen chem section of dat destroyer. If there is 1x10^-12 M HCl solution is that why water needs to be incorporated in the solution? Also, the solution says 1x10^-12 + 1x10-7 is around 1x10^-7. I don't understand how that...
  28. starsbeneathme

    Help on DAT destroyer, General Chemistry - Ideal Gas Law

    Hi, This is question 70 in the 2014 edition: 600 mL of a gas initially at 27 C and 755 torr will contain how many molecules? Answer: 1.5 x 10^22 molecules This answer was calculated using the ideal gas law. Even though these aren't standard conditions, should we use ideal gas law anyway if...
  29. CavsFan2016

    One semester of general chemistry?

    Hi everyone, I have seen that most schools require 2 semesters of general chemistry. However, at my school, they have transitioned to teaching only one comprehensive semester of general chemistry. I am a recent graduate looking to apply this cycle, and I am concerned about what medical schools...
  30. DMikes

    Chad's Videos Error

    @ 16:40 of Nuclear Chemistry Video Fastmode in Chad's Videos he wrote the attached picture on the board. Shouldn't the # of protons be 91, not 93? http://imgur[DOT]com/gallery/CJ8arfD It appears that my image isn't working. Anyways, what he wrote on the board was that 238, 92 U ----> 2 alpha...
  31. briggsinator2

    Ea (activation energy) and constant k

    Question: so in Chad's videos it is suggested that an increase in Ea (activation energy) causes a decrease in the reaction coefficient k, because an increased Ea will decrease the rate. However, in Princeton Review it is suggested that thermodynamics (i.e. Ea) are independent of kinetics (i.e...
  32. big-smiles

    Chad's Videos on coursesaver

    Hey! :) First Question-- I'm aware that Chad is in some sort of dispute with course saver, but his videos are still on the course saver website. I wanted to purchase a 30 day subscription for his videos on course saver-- and tried multiple times to make a purchase-- but the website wouldn't let...
  33. D

    Gold Standard DAT Prep

    Anyone have any experience with the Gold Standard DAT prep books? I was considering ordering the chemistry one to supplement all other material that I have.
  34. D

    DAT Extra Problems

    I have been working through Chad's videos and doing his quizzes after and then following up with the quizzes in the corresponding Kaplan sections. Although this is SOME practice, it is not nearly enough. I was wondering if anyone knew any resources/websites that gave extra General Chemistry...
  35. M

    Chemistry Clarification: hydrophobic/hydrophilic, acidic/basic, polar/nonpolar, +/- charged

    Hi! 1. I am looking for some clarification of the relationship between these concepts. hydrophobic/hydrophilic non-polar/polar negatively charged/positively charged acidic/basic I understand that a molecule can be any of the above. But I am wondering how these are related. From my current...
  36. L

    General Chemistry MCAT 2015 Review

    What do you guys recommend is the best for reviewing general chemistry for the MCAT 2015? I took general chemistry dual enrollment as a Junior in high school at a local college and then transferred the credits to the 4 year university where I'm getting my bachelor's in biology. The course I took...
  37. D

    Boiling point comparison between of H2S, H2Se, H2Te

    So the actual trend here is H2S<H2Se<H2Te. What I dont understant is that H2S has the strongest dipole dipole interaction and since dipole-dipole interaction is stronger than dispersion force, H2S really should have higher boiling point than H2Se but why is it the opposite?