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Hello,
Passage 3, q.1 in AAMC physical sciences section bank asks us to identify a molecule and its name. It is a modification to a phospholipid with a nitrogenous group attached to the phosphate head. The molecule is called a phosphatide.
Is there a list of molecule names we should be memorizing? I don't think I would have been able to answer this question without memorizing the functional groups present in a phosphatide. Is there anyway I could have come to the conclusion based on reasoning vs. memorization?
Thank you
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For the physical sciences section bank AAMC - q. 2 asks us tp identify the reaction that lead to the product within the passage. The answer is the carboxylation of hydroquinone. Hydroquinone is not discussed within the passage, so to answer this question I would most likely need to have memorized the structure of this molecule - is this need to know for MCAT?
Is there another way I could have intuitively answered this question? I thought the answer would be a oxidation reaction due to the abundance of oxygen bonds in the product shown in the passage.
Thank you:)
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Hello,
Altius COVID 4 question 29 is an application of the ideal gas law - however, looking at the Altius solution, I don't think I would be able to finish this question and would probably mark it and move on. In class, Mike taught us to use STP parameters to make our PV=nRT equations a bit easier. Would Mike's method work with this question? If it can, could you please walk me through it?
Thank you
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Hello,
One of the flashcard question from the physics AAMC questions states:
"Suppose a certain far-sighted person can see objects clearly no closer than 300 cm away. What is the minimum distance from a plane mirror such a person must be to see his reflection clearly?"
We never really discussed plane mirrors - could someone please explain to me why this distance would be halfed?
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Hello,
In the Altius 3 COVID exam, passage #2, question 7 - I have a few clarifying questions.
The question is asking about the dissolution of the same mass solids in some solvent, and their respective ratios.
The chemical equation in question is as follows:
4Ca5(PO4)3F(s) + 18SiO2(s) + 30C(s) --> 3P4(g) + 30CO(g) + 18CaSio3(s) + 2CaF2(s).
The question asks if 12.5 g of each of the solids produced in this reaction were combined with 1.7L of water and stirred until no further dissolution occured, which relationship would be true of the resulting solution?
The answer is that the concentration of Ca2+ would be greater than the concentration of SiO32-.
For this answer, I'm wondering if it is as easy as seeing that there is more calcium in our products than SiO3? Or is there some math involved? I think what through me off was the stoichiometric coefficients and how to account for them when we were dissolving in a solvent.
Thank you
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