Mistakes 3, bag 2

Question 1

KMT(3)

Answer 1

(1) particles of a gas are in constant random motion
(2) their volume is negligible compared to the volume of the container in which they reside
(3) they experience no intermolecular forces, ie attraction/repulsion

Question 2

KMT, continued

Answer 2

(4) particle collisions are completely elastic, meaning they preserve ke and momentum
(5) the average ke of the particles is proportional to the temperature in Kelvin

Question 3

term for covalent and ionic bonds, as well as metallic

Answer 3

intramolecular forces

Question 4

inner portion of the DNA double-helix

Answer 4

H-N bonds

Question 5

vapor pressure

Answer 5

inversely related to boiling point

Question 6

determining boiling point and melting point (4)

Answer 6

(1) check for hydrogen bonds
(2) if not, check for dipole-dipole forces with a large difference in electronegativity of atoms
(3) if not, check for London dispersion forces, aka van der walls forces (4) the stronger the intermolecular forces are, the higher these will be

Question 7

polarizability (5)

Answer 7

(1) the ability of matter, when subjected to an electric field, or to permanent dipole-dipole forces, to acquire a temporary dipole
(2) aka “induced dipole” (3) larger molecules are more polarizable because they have more total e- (4) molecules that are less bunched up and expose more surface area, are more polarizable (5) but the main factor is type of intramolecular force

Question 8

amorphous covalent network solids (3)

Answer 8

(1) rubber, plastic, gels, glass
(2) no distinct melting point
(3) no definite lattice structure

Question 9

lard

Answer 9

the rendered stomach fat of a pig

Question 10

types of solids (4)

Answer 10

(1) ionic
(2) molecular
(3) covalent network
(4) metallic

Question 11

galvanized (3)

Answer 11

(1) “of iron or steel”
(2) coated in a protective layer of zinc to protect against corrosion;
(3) this is done by dipping it into molten zinc

Question 12

resonance (4)

Answer 12

(1) aka mesomerism
(2) when there are multiple valid Lewis dot structures for a single molecule
(3) ie where to put the pi bond etc, and it actually exists as a dotted line
(4) when this occurs, you must evaluate the formal charge in order to find the resonance hybrid

Question 13

3D lattice characterizes (2)

Answer 13

(1) ionic solids
(2) crystalline covalent network solids

Question 14

homogeneous mixture (2)

Answer 14

(1) appears uniform throughout
(2) aka “solution”

Question 15

distillation curve

Answer 15

a plot of temperature versus volume of distillate collected

Question 16

solubility (3)

Answer 16

(1) the ability of a solute to dissolve in a solvent
(2) “like dissolves like”
(3) this is higher in substances with similar polarities

Question 17

ethanol (2)

Answer 17

(1) the substance found in alcoholic beverages
(2) boiling point 78 degrees Celsius