Ch. 3 Quiz

Question 1

A dietary Calorie equals 1 kilocalorie. What correctly defines 1 kilocalorie?

Answer 1

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

Question 2

One mole of glucose (molecular mass = 180 daltons) is

Answer 2

180 grams of glucose

Question 3

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

Answer 3

Cohesion
Moderation of temperature
Expansion upon freezing
Solvent properties

Question 4

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

Answer 4

Stomach acid, urine, blood

Question 5

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

Answer 5

pH 2

Question 6

Relative to a pH of 9, a pH of 7 has a _____________

Answer 6

100 times higher H+ concentration

Question 7

How would acidification of seawater affect marine organisms?

Answer 7

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

Question 8

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

Answer 8

Hydrogen bond