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Try out 4 sample questions (feedback wanted)
I want to try to develop some better MCAT practice material that is more inline with real research-article based questions. When I was practicing I usually felt a bit overwhelmed by the research...
View ArticleNS FL 1 C/P 47
What is the relationship between Keq and Ka? I don't understand why A is the answer to this question. Thanks in advance!
View ArticleResistor and Capacitor when voltmeter reads 0
View attachment 208317 Excuse the terrible drawings. When the voltmeter reads 0. The resistor ratio would be R1/R2=R4/R3 The capacitor ratio would be C1C2=C3C4? or C1C4=C2C3?
View Articlehalf/full d orbitals
when it is s2d4 it wants to become half full to s1d5 or when it is s2d9 it wants to become full to s1d10 does this rule only apply to when d oribtal is d4 and d9? (ie. d3 wouldn't become half full,...
View ArticleIs there a way to get the value of [E]T from the lineweaver-plot?
View attachment 208332 The passage seems to indicate that we are able to get the [E]T from the plot, is that even possible? The question related to this graph was a M1V1=M2V2 problem to get [E]T. So I...
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NS Fl #6 difficulty
Just finished the C/P section and on break. Man was it filled with LONG calculations, rushed to the end. Way harder than Fl 1-5... Anyone else have the same feeling?
View ArticleTBR Physics Example 1.11
I don't understand how Nitrogen B donates to the aromatic ring through resonance. I think i'm having a hard time picturing the electron pushing in this case. Can anyone help me try to understand that.
View ArticleAcids and bses
1 mL of a strong acid solution has a pH of 2.3. It is diluted with water to make a 100 mL solution. What is the new pH? I don't really understand the concepts behind this question, could someone show...
View Articleacidity quesiton
View attachment 208403 Increasing pKA=decreasing acidity. this tests the inductive effect. The more electronegative the atom=the more it makes the overall compound want to donate a proton=strong acid....
View ArticleNS6 C/P #4
View attachment 208405 From what I understand, there is open pipe (open at both ends) and closed pipe (open at only one end) Open pipe: L=nlamdba/2 Closed pipe: L=nlambda/4 The q-stem states that the...
View ArticleNucleophilicity vs. Basicity
From my (perhaps flawed) understanding... It seems like the same general factors govern nucleophilicity (kinetic term related to reaction rate) and basicity (thermodynamic term related to acid/base...
View ArticleNS6 C/P #29
View attachment 208412 Why would B not work? There is a disappearance of one C=O bond (bottom left corner), which indicate a disappearance of a strong peak at 1720 cm^-1. Is it because there are 2 OH...
View ArticleKhan academy p/s passage
For this one, are A, C, and D pretty much the same answers? Also, if one person gets STD, then in the long chain version, can't the disease still spread?
View ArticleKhan academy P/S marijuana passage
For this one, is the answer B because grade level peers have a greater effect, thus it would be easier to just target all students instead of picking out individual marijuana users? since trying to...
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Competitive Inhibitor
I understand to identify a competitive inhibitor, the Km increases and the Vmax doesn't change. I was going through a SB C/P problem (#77) and thought how could Km change based on a constant Vmax? If...
View ArticleSDS-page reducing vs. non-reducing vs. native
Native-page: everything in-tact, separated by size and charge or shape. ie. If we had a heterotrimer, we only would see one band. SDS-page non-reducing(w/o B-ME): S-S are intact but protein is...
View ArticleWind speed and doppler effect
Never would I have thought that wind has any effect on sound waves, but... "The source of a sound wave is stationary. The observer is moving toward the source. There is a steady wind blowing from the...
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Need help confirming this fact. (CARS qpacks)
Just to confirm, the years go like. 3200BC to 0 (decreasing in number means increasing in time) And then anything without a BC comes after. So like 1400BC is earlier than 600 (6th century). Definitely...
View ArticleAAMC Guide Practice Problem
This one is Passage Set 2 of Chemical and Physical Foundations. It is number 9. The question asks what are the units for the rate constant ku? I understand how they calculated the units. I just don't...
View ArticleSB PS #24
View attachment 208477 I'm having trouble understanding the difference between proximal vs. distal stimulus. In another thread, I read that proximal stimulus is when the sensory receptors are...
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