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APRIL MCAT > Chem/Phys > Flashcards

Chem/Phys Flashcards

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MCAT flashcards
1
Q

What is the temperature at which particles are unable to move?

A

0 degrees Kelvin

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2
Q

How to convert degrees celcius to kelvin?

A

Add 273

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3
Q

When will an object float in a liquid?

A

When the specific gravity of the object is LESS than the specific gravity of the liquid

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4
Q

What is the relationship between pressure, force, and area?

A

P = (F/A)

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5
Q

What is the formula for hydrostatic pressure?

A

P = pgz
Pressure = densitygravitydepth

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6
Q

What is the SI unit for mass?

A

Kg

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7
Q

What is the formula that relates change in gibbs free energy, change in enthalpy, temperature, and change in entropy?

A

△G = △H - T△S

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8
Q

Is △G positive or negative when the reaction is exothermic?

A

△G is negative

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9
Q

If a reaction is endothermic, which side of the reaction does heat go?

A

Heat goes on the reactants side

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10
Q

How do you write a rate law for a reaction?

A

Rate = (k constant)*[concentration of reactants]^raised to coefficient

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11
Q

What are the SI units for density?

A

kg/L, g/mL, g/cm^3

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12
Q

What is the volume of 1 mole of an ideal gas at STP?

A

22.4 L

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13
Q

How are temperature and volume related?

A

At constant pressure conditions, temperature and volume and directly related

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14
Q

In gas liquid chromatography, the first peak to emerge will be from which compound?

A

The first peak will be from the least polar, most volatile compound

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15
Q

What is the standard atmospheric pressure in mm Hg?

A

760 mm Hg

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16
Q

The molar volume of an ideal gas at 25 degrees C is:

A

22.4L

17
Q

What do proteases do?

A

They cleave peptide bonds

18
Q

What do lipases hydrolyze?

A

Triacylglycerides

19
Q

In glycogen, each glucose subunit is connected to an adjacent glucose subunit by:

A

An alpha 1,4-glycosidic bond

20
Q

What happens when an atom goes through alpha decay?

A

The mass number decreases by 4 and the atomic number decreases by 2

21
Q

What happens when an atom goes through beta- decay?

A

The mass number does not change and the atomic number increases by 1

22
Q

What happens when an atom goes through beta+ decay?

A

The mass number does not change and the atomic number decreases by 1

23
Q

What happens during gamma decay?

A

Nothing about the atom changes

24
Q

What is Deuterium?

A

H with a mass of 2 since it has a neutron

25
Q

In gel filtration chromatography, will the large or small solutes elute first?

A

Larger solutes do not penetrate the pores of the beads in the column, so they elute FASTER than smaller solutes and thus elute first

26
Q

What binds to the column in anion exchange?

A

Negatively charged molecules bind

27
Q

What binds to the column in cation exchange?

A

Positively charged molecules bind

28
Q

How do you find the total energy of a photon?

A

You combine the ionization and kinetic energies

29
Q

If the pH is lower than the pI, what charge does the molecule have?

A

A positive charge

30
Q

Which will always have the smaller ionic radius: a cation or an anion?

A

A cation

31
Q

In which medium does sound travel the fastest?

A

In solids

32
Q

What is the equation for buoyant force?

A

Buoyant force = density of fluid * volume of liquid displaced

33
Q

What does a positive voltage clamp indicate?

A

Indicates a negative membrane (ionic) current, which could result from either negative ions flowing into the cell or positive ions flowing out of the cell

34
Q

Name 2 possible equations for catalytic efficiency

A

Vmax/Km OR Kcat/Km

35
Q

Relate energy, power, and time

A

Power = Energy / Time

36
Q

When a material is going though a phase change, it will alway be accompanied by a change in:

A

Density and entropy

37
Q

What is a bronstead lowry base?

A

A bronstead lowry base accepts protons

38
Q

What is a lewis base?

A

A lewis base donates electrons

APRIL MCAT (3 decks)

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