chapter 3 quiz

Question 1

the partial negative charge at one end of a molecule is attracted to the partial positive charge of another water molecule. what is this attraction called?

a: a hydrogen bond
b: an ionic bond
c:nonpolar covalent bond
d:polar covalent bond
e: van der Waals interactions

Answer 1

hydrogen bond

Question 2

which of the following effects is produced by the high surface tension of water?

a: lakes don’t freeze solid in winter, despite low temperatures
b:a water strider can walk across the surface of a small pond
c:organisms resist temperature changes, although they give off heat due to chemical reactions
d: evaporation of sweat from the skin helps to keep people from overheating
e:water flows upward from the roots to the leaves in plants

Answer 2

a water strider can walk across the surface of a small pond

Question 3

a dietary calorie equals 1 kilocalorie. which of the following statements correctly defines 1 kilocalorie?

a:1000 calories, or the amount of heat required to raise the temperature of of 1 g of water by 1000 degrees celsius
b: 100 calories, or the amount of heat required to raise the temperature of of 100 g of water by 1 degrees celsius
c: 10000 calories, or the amount of heat required to raise the temperature of of 1kg of water by 1 degrees celsius
d:1000 calories, or the amount of heat required to raise the temperature of of 1kg of water by 1 degrees celsius
e: 1000 calories, or the amount of heat required to raise the temperature of of 100 g of water by 100 degrees celsius

Answer 3

1000 calories, or the amount of heat required to raise the temperature of of 1kg of water by 1 degrees celsius

Question 4

one mole (mol) of glucose (molecular mass=180 daltons) is ________

a:180x10^23 molecules of glucose
b:1 kilogram of glucose dissolved in 1liter of solution
c:180 kilograms of glucose
d: 180 grams of glucose
e:18.0 grams of glucose

Answer 4

180 grams of glucose

Question 5

the four emergent properties of water that are important for life are:

a:cohesion, expansion upon freezing, high heat of evaporation, and capillarity
b:cohesion, moderation of temperature, expansion upon freezing, and solvent properties
c:moderation of temperatures, solvent properties, high surface tension, and capillarity
d: heat of vaporization, high specific heat, high surface tension, and capillarity
e:polarity, hydrogen bonding, high specific heat, and high surface tension

Answer 5

cohesion, moderation of temperature, expansion upon freezing, and solvent properties

Question 6

rank from low to high, the pH of blood, stomach acid, and urine

a:blood, urine, and stomach acid
b: stomach acid, blood, and urine
c: urine, blood, stomach acid
d:stomach acid, urine, blood
e:blood, stomach acid, and urine

Answer 6

stomach acid, urine, blood

Question 7

what is the pH of a solution with a hydroxyl ion [OH^-] concentration of 10^-12M

a:pH2
b:pH4
c:pH10
d:pH12
e:pH14

Answer 7

pH12

Question 8

sugar dissolves when stirred into water. the sugar is the _____, the water is the _______ and the sweetened water is the _____.

a: solution, solvent, solute
b:solute, solvent, solution
c:solvent, solute, solution
d:solution, solute, solvent
e:solvent, solution, solute

Answer 8

solute, solvent, solution

Question 9

relative to a pH of 9, a pH of 7 has a______

a:200 times higher H+ concentration
b: 100 times higher H+ concentration
c: 20 times higher h+ concentration
d: 20 times lower H+ concentration
e: 100 times lower H+ concentration

Answer 9

100 times higher H+ concentration

Question 10

How would acidification of seawater affect marine organisms?

a:acidification would increase dissolved carbonate concentrations and promote faster growth of corals and shell-building animals
b:acidification would decrease dissolved carbonate concentrations and promote faster growth of corals and shell building animals
c:acidification would increase dissolved carbonate concentrations and hinder growth of corals and shell building animals
d:acidification would decrease dissolved carbonate concentrations and hinder growth of corals and shell building animals
e: acidification would increase dissolved bicarbonate concentrations and cause increased calcification of corals and shellfish

Answer 10

acidification would decrease dissolved carbonate concentrations and hinder growth of corals and shell building animals