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Sam's MCAT Flashcards > Chem-Phys Flashcards > Flashcards

Chem-Phys Flashcards

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MCAT flashcards
1
Q

Does the particular wavelength produced by a falling electron have to do with the particular atom or the length of the fall or both?

A

Particular atoms produce different wavelengths of light when electrons are excited and fall. It isn’t just about the length of the fall.

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2
Q

Is Zero a constant?

A

Zero is a constant

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3
Q

What are the formlulas to find the change in x and the change in y?

A

change in y= v(y)t + 1/2at2

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4
Q

If an object has a constant rotational velocity, what else is constantly changing?

A

If an oject has a constant rotational velocity, the acceleration is constantly changing.

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5
Q

Which has stronger hydrogen bonds: Water or Ammonia?

A

Water has stronger hydrogen bonds than ammonia

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6
Q

How do you determine relative bond length

A

The smaller the atoms the shorter the bond length

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7
Q

What are the different geometic configurations and their appropriate bond angles.

A

Memorize geometrical bond angles. Also larger atoms will make bond angles smaller for smaller atoms.

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8
Q

What us a metathesis reaction?

A

A metathesis reaction is synonymous with a double displacement reaction, in which two reactants exchange cations.

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9
Q

If a molecule looks like it has stoichoimetry, does it?

A

If it looks like stoichiometry and then it probably is

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10
Q

What are Lewis acids? Lewis bases?

A

Electron accepters are lewis bases

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11
Q

What should you always pay attention to when working with acids and bases?

A

Pay attention to protons when working with acids and bases

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12
Q

What is the relationship between the pH and pOH of water in regards to temperature?

A

The pH and the pOH of water is always equal regardless of temperature

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13
Q

Can a pH value be negative?

A

pH can totally be negative

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14
Q

What can two pi orbitals that were derived from the same carbon atom not be?

A

That two π orbitals derived from the same carbon atom cannot be parallel

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15
Q

If E°cell > 0 V for a given galvanic cell, then what is true about ΔG?

A

If E°cell > 0 V for a given galvanic cell then ΔG < 0

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16
Q

What is the function of a salt bridge in a galvanic cell?

A

A salt bridge in a galvanic cell allows positive ions to move toward the cathode.

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17
Q

N/A

A

Memorize common molecules geometric shapes (ex. C02 linear and SO2 bent)

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18
Q

N/A

A

Read and check every answer even when confident

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19
Q

N/A

A

I’m given paper. USE IT

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20
Q

N/A

A

Just becuase an answer seems unrelated doesn’t mean there isn’ta relationship there, and isn’ta valid reason to cross it out. Ask yourself if its true, even if it seems unrelated.

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21
Q

N/A

A

DEAR GOD READ EVERY ANSWER

22
Q

N/A

A

The pH and the pOH of water is always equal regardless of temperature

23
Q

Is the static force calculation for the actual static force?

A

The static force of an object calculated is the maximum, not the actual

24
Q

Without non conservative forces what is the only force a projectile expereineces?

A

Without non conservative forces a projectile only experiences gravity

25
Q

What is the conversion from mmHg to atm?

A

1 atm = 760 mmHg

26
Q

What is homotropic regulation?

A

Homotropic regulation is when a molecule serves as a substrate for its target enzyme, as well as a regulatory molecule of the enzyme’s activity. Basically it means that as something binds to the enzyme the affinity for the enzyme to bind to that thing again goes up

27
Q

Is the volume of a mass of air constant?

A

Gasses are compressible and therefore the volume of a mass of air is not constant

28
Q

How does decreasing temerature affect the amount of water in the air?

A

With decreasing temperature the air is able to hold less water and would therefore has les mass water

29
Q

What is the volume of an ideal gas at STP in liters?

A

An ideal gas at STP occupies 22.4 L

30
Q

N/A

A

READ THE QUESTION

31
Q

N/A

A

The answer is in the passage

32
Q

Would the tittration endpoint of a weak acid using a strong base be above or below 7?

A

The titration endpoint of a weak acid using a strong base would be above pH of 7

33
Q

N/A

A

Memorize 3 letter and 1 letter abreviations for amino acids

34
Q

What is an imide?

A

An imide is R=N-R’

35
Q

What are the equations required to figure out % dissociation?

A

pH = -log [H+]

[H+]/[HF] * 100

36
Q

What is the equation for gravitational potential energy?

A

mgh

37
Q

What is the equation for power?

A

Power = work/time

38
Q

What is released during both directions of radioactive decay?

A

If the decay results in a higher atomic number then a positron is released, if the decay results in a lower atomic number then an electron is released

39
Q

What is a buffer made of?

A

A buffer is made of a weak acid or a weak base and a cooresponding salt

40
Q

What is the minimum frequency of an ultrasound?

A

Ultrasounds are above human hearing, so since human hearing ranges from 20Hz to 20kHz an ultrasound is anything above 20kHz

41
Q

What enzyme digests lipids?

A

Lipases digets lipids

42
Q

How can gycolysis favor the formation of pyruvate but also have shared enzymes with Glycogenesis?

A

The formation of glucose, fructose-6-phosphate, and PEP through gluconeogenesis-specific enzymes push the equilibrium of reactions catalyzed using shared enzymes to favor gluconeogenesis.

43
Q

How does the total capacitance work for capacitors in parralell and in series?

A

The total capacitance for capacitors in series is the sum of eaches recipracol, and in parralell it is the sum of their capacitances

44
Q

What is aspartame classified as?

A

Aspartame is classified as a dipeptide

45
Q

What does amphiprotic mean?

A

Amphiprotic means something that can act as both an acid and a base

46
Q

How do impurities effect the melting point?

A

If there are a lot of impurities the melting point range will be wide. The more pure the substance the more narrow the range. Remember that the melting point range can not go over the given melting point of a pure substance.

47
Q

How do you calculate normality?

A

Normality = Molarity * # of protons per molecule

48
Q

How do strong acids act in water? Is perchloric acid a strong acid?

A

Strong acids dissociate completely, note: perchloric acid is a strong acid

49
Q

What is the equation for working with water that is leaving a container?

A

When working with water leaving a container:

P1 + ρgy1 + 1/2 ρv12 = P2 + ρgy2 + 1/2 ρv22

50
Q

What is a difference between glucose and sucrose, what does this difference make glucose?

A

Glucose has a hemiacetal group and sucrose does not, this makes glucose a reducing sugar

Sam's MCAT Flashcards (4 decks)

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