Oxidation number question
I don't understand how the nitrogen in this molecule will have a oxidation number of -3. It does get 3 electrons from the 3 hydrogens but the overall charge of the nh3 is +1. How does this work? Thanks!
View ArticleCan someone explain the basis of the membrane potential? (conc gradient +...
Im having a hard time understanding how the interaction of the concentration gradient, the elctrical gradient, and the existence of the other ions play into and interact with eachother to result in the...
View ArticleAAMC Phys/Chem/BC Section pack q#8
Hello guys, I am having a hard time understanding the reasoning behind this question. I got it right somehow. What I was thinking during this question was the question asks about "energy meter" which...
View Articlecouple of questions
1) Why is it that out of all hydroxides, only akali metals and akaline earth metal hydroxides are considered strong bases? Why not Al(OH)3? 2) Why does adding impurities to a compound broaden the...
View ArticleExamkracker Chemistry Lecture 2 Practice Questions #27 and #29
Hey SDNers, I am studying for the MCAT and I had a couple questions from Chemistry Lecture 2 Examkracker Practice Problems. #27. Ammonia burns in air to form nitrogen dioxide and water. 4NH3(g) +...
View ArticleBerkeley Review for Self Study, Recommend, if so why?
I have heard good things about TBR. Do the books teach as if you are already solid on content review? Or do they walk you through beginning to end? Are there any books in particular great from TBR,...
View ArticleExam Cracker and Berkeley Review Full Lengths good?
Having completed TPR Full lengths I am considering buying Berkeley Review Full Lengths or Exam Crackers FL. What are the strengths of each provider? Meaning is EC better at some sections that TBR and...
View ArticleTaking the MCAT while taking courses in School
Hello, I was hoping someone could share some thoughts on taking the MCAT while in school. I will be preparing over summer, but may need to take it two weeks into my school semester. Im concerned that...
View ArticleHas anyone studied for the MCAT in 3 months?
Hello Everyone! I'm on summer break right now, and I plan to take my MCAT for the first time within the first week of September. I was wondering if any of you have studied for the MCAT in 3 months and...
View ArticleHow many products are expected when the decapeptide VRVPVSQLQM is digested by...
How many products are expected when the decapeptide VRVPVSQLQM is digested by an aminodipeptidase specific for N-terminal valine? A. Two products Your Answer B. Three products C. Four products Correct...
View ArticleOld Taker taking New MCAT - Physics
How much of the physics was actually removed? I scored a 10, 10, 11 last time (31 total). I spent most of it studying for physics...I know its like 16 vs 26 physics questions now but what should I...
View ArticleC/P Section Bank #34
Question: What mass of NaCl (Molar Mass = 58.5g/mol) will be present in 100 microliters of solution (NaCl concentration = 0.1mM)? a)585 nG --CORRECT b)585 micrograms c)5.85 micrograms 5.85 mG Worked...
View ArticleAAMC Scored B/B Questions
1) Based on the data presented in the passage, which statement best describes the HSP110ΔE9 allele? I understand the cancer-suppressing part, but don't understand how to figure out that HSP110ΔE9 is...
View ArticleOne Month to MCAT!!! Study plan advice!
Hey everyone new poster here! I wanted to get advice on how to study to improve my points on the new MCAT. I have the Next Step exams, Kaplan, and AAMC FL. My MCAT is on June 30th and I'm trying to get...
View ArticleHow would you answer this MCAT question?
If, because of a mutation, a diploid cell should arrest at the end of mitosis and fail to enter interphase, then as a direct result: A. there will be a failure of protein synthesis B. there will be a...
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Princeton Review Hyper learning 2011
Someone is offering an unmarked PR Verbal Hyperlearning 2011 for $50. Is the 2011 version the same as the current version? Is $50 a good deal? Is the TBR verbal any good? I have essentially done all...
View ArticleHow to Prepare for the Mcat
I know this has been asked a million times but I just want to hear some new opinions. I am looking into buying the Princeton Review MCAT set which covers all 7 subjects. I plan to use this as my main...
View ArticleAAMC FL2 C/P #42
What is the pH of a buffer solution that is 0.2M HCO3- and 2M H2CO3? (First pKa of carbonic acid is 6.37) Answer: 5.37 If the HH equation is pH= pKa + log([A-]/[HA]) then that should be 6.37+log(0.2/2)...
View ArticleQuestions about fatty acid synthase
is the very first starting molecule acetyl coa? And then it adds malonyl coa to the growing chain while also removing co2 so that essentially you are growing the chain by 2 carbons at a time? Is this...
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