AP Biology Test 1
Which of the following solutions has the greatest concentration of hydrogen ions [H+]?
gastric juice at pH 2
The two molecules shown in the following figure are best described as
geometric isomers
What determines the cohesiveness of water molecules?
hydrogen bonds
Which of the following solutions has the greatest concentration of hydroxide ions [OH-]?
seawater at pH8
Why does ice float in liquid water?
Hydrogen bonds stabilize and keep the molecules of ice farther apart than the water molecules of liquid water
One mole (mol) of a substance is
6.02x10^23 molecules of the substance and the molecular mass of the substance expressed in grams
Which of the following ionizes completely in solution and is considered to be a strong base?
NaOH
Which property of the carbon atom gives it compatibility with a greater number of different elements than any other type of atom?
carbon has a valence of 4
What do cohesion, surface tension, and adhesion have in common with reference to water>?
all are properties related to hydrogen bonding
Observe the structures of glucose and fructose. These two molecules differ in the?
arrangement of carbon, hydrogen, and oxygen atoms
Organic Chemistry is a science based on the study of?
carbon compounds
What type(s) of bond(s) does carbon have a tendency to form?
covalent
The formation of ice during colder weather helps moderate the seasonal transition to winter. That is mainly because
the formation of hydrogen bonds releases heat