Chem/Phys

Question 1

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

Answer 1

0 degrees Kelvin

Question 2

How to convert degrees celcius to kelvin?

Answer 2

Add 273

Question 3

When will an object float in a liquid?

Answer 3

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

Question 4

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

Answer 4

P = (F/A)

Question 5

What is the formula for hydrostatic pressure?

Answer 5

P = pgz
Pressure = densitygravitydepth

Question 6

What is the SI unit for mass?

Answer 6

Kg

Question 7

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

Answer 7

△G = △H - T△S

Question 8

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

Answer 8

△G is negative

Question 9

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

Answer 9

Heat goes on the reactants side

Question 10

How do you write a rate law for a reaction?

Answer 10

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

Question 11

What are the SI units for density?

Answer 11

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

Question 12

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

Answer 12

22.4 L

Question 13

How are temperature and volume related?

Answer 13

At constant pressure conditions, temperature and volume and directly related

Question 14

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

Answer 14

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

Question 15

What is the standard atmospheric pressure in mm Hg?

Answer 15

760 mm Hg

Question 16

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

Answer 16

22.4L

Question 17

What do proteases do?

Answer 17

They cleave peptide bonds

Question 18

What do lipases hydrolyze?

Answer 18

Triacylglycerides

Question 19

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

Answer 19

An alpha 1,4-glycosidic bond

Question 20

What happens when an atom goes through alpha decay?

Answer 20

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

Question 21

What happens when an atom goes through beta- decay?

Answer 21

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

Question 22

What happens when an atom goes through beta+ decay?

Answer 22

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

Question 23

What happens during gamma decay?

Answer 23

Nothing about the atom changes

Question 24

What is Deuterium?

Answer 24

H with a mass of 2 since it has a neutron

Question 25

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

Answer 25

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

Question 26

What binds to the column in anion exchange?

Answer 26

Negatively charged molecules bind

Question 27

What binds to the column in cation exchange?

Answer 27

Positively charged molecules bind

Question 28

How do you find the total energy of a photon?

Answer 28

You combine the ionization and kinetic energies

Question 29

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

Answer 29

A positive charge

Question 30

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

Answer 30

A cation

Question 31

In which medium does sound travel the fastest?

Answer 31

In solids

Question 32

What is the equation for buoyant force?

Answer 32

Buoyant force = density of fluid * volume of liquid displaced

Question 33

What does a positive voltage clamp indicate?

Answer 33

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

Question 34

Name 2 possible equations for catalytic efficiency

Answer 34

Vmax/Km OR Kcat/Km

Question 35

Relate energy, power, and time

Answer 35

Power = Energy / Time

Question 36

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

Answer 36

Density and entropy

Question 37

What is a bronstead lowry base?

Answer 37

A bronstead lowry base accepts protons

Question 38

What is a lewis base?

Answer 38

A lewis base donates electrons