Stereoisomer Question
1,3 - dimethylcyclohexane has two chiral carbons. How many possible stereoisomers can be written? There are 2 chrial centers So 2 ^n = 4 stereoisomers However, if you were to draw the compound out, 4...
View ArticleEquilibrium (Law of Mass Action vs ICE tables)
Good evening! I was wondering if someone could explain to me when we use the Law of mass action vs ICE tables. I've been doing a few problems where I've been solving the problem wrong because I did not...
View ArticleC/P section bank #63
Can someone kindly explain what is going on among the different species in each of the three experimental conditions (1-3)? @aldol16 ? I can't visualize the biotin/Dnmt3a/DNA interactions... Thank you!
View ArticleYoung's modulus-TPR workbook
In the passage, it's talking about the stress put on a homogenous pole, three equations are given: 1) Youngs modulus (E) = stress applied to pole/fractional change in pole length 2) fractional change...
View ArticleGolgi and rER modified proteins vs only rER modified proteins
Hey, a fresh student here. I was asked and couldn't find an answer - what differs proteins that are modified by rER and the Golgi by those that modified ONLY by the rER? thanks
View ArticleDiabetes Insipidus
Can someone please explain this question & answer to me: "Diabetes insipidus (DI) is caused by an insensitivity of the kidneys to anti-diuretic hormone (ADH), or by a deficiency of that hormone....
View ArticleTollens test
Why is it that alpha hydroxy ketones will come out as positive for tollens test? Also why is it that ketones in general will come out as negative for tollens test? Sent from my iPhone using SDN mobile
View ArticleEK 30 min exam Chem 2015 Reaction Rates
Hey guys, This is from EK 30 min exam 1 Passage 2 in Chem. The passage question is: Why can Equation 1 be used to measure the rate of Reaction 1? I understand that the rate of the reaction is based off...
View ArticleUracil and Thymidine
Hello, Sorry to cross-post, but the nontrads told me I'd have a better chance of getting an answer here. I'm studying for the MCAT and something has been bothering me not because I'm worried about...
View ArticlePitot tube confusion
Below is an attached image of pitot tube from KA lecture, however I'm confused about the way it works. For the top right chamber, we call that pressure where the purple dot is the static pressure and...
View ArticleKinetic energy of gas molecules
So I know that average kinetic energy of gas molecules at a certain temperature is same no matter what the gas is. I was just wondering why each individual gas molecules cannot have same kinetic...
View Articlefluorescence
Why is there a difference between peak excitation wavelength and peak emission wavelength when a substance absorbs photon of certain energy? Why is the emission photon lower in energy? Also is...
View ArticleTLC solvent
Why is it that using a more polar solvent leads to greater movement of the spots in general? I learned this from chads video but I still don't understand. For example, if you have something nonpolar...
View ArticleHI Stronger than HClO
Hi all! Can someone explain to me why HI is a stronger acid than HClO please? TBR says HI is stronger but I was thinking HClO is more acidic because its attached to oxygen and chlorine is more...
View ArticleEK 101 passages
so attempted the MCAT in 2015 and still at it. woot. anwyas. my verbal score is always low. I'm going to try and do 3 passages a day but even looking at the answer key still stumps me. does anyone have...
View Articleether solubility
Why is it that cyclic ethers are soluble in water whereas aliphatic ethers like ethylmethyl ether are not? Also, shouldn't all ethers in general be a polar molecule because of lone pairs on oxygen?
View ArticleAzeotrope
For Azeotropes I know that it is a mixture that cannot change its component percentage because the vapor composition and liquid compositions are same. Why does this happen? Why stop at certain point?...
View ArticleBoiling point trend
When comparing boiling point of h2o, h2s, h2se, and h2te, the trend is h2o>h2te>h2se>h2s. I understand that the greater molecular weight allows greater van der waals forces, but doesn't h2s...
View ArticleTPR Course Test 1: Rate of reaction
Hello, I can't understand why D is incorrect. It seems that the DOPC + raclopride is increasing linearly over time. So why is D incorrect? Thank you!
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Organic Chemistry Question
The answers are 5) A and 6)C I am confused why #5 would be A considering KOH isn't a bulky base. I thought it would produce the Zaitsev product. #6 I am not sure how it moved over a whole C-C bond...
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