BIOL 171 Chapter 2 Mastering Biology
Exam Questions & Answers
What is the mass number of an ion with 107 electrons, 157 neutrons, and a
+1 charge? - -265
- What is the pH of an aqueous solution with the hydronium ion
concentration
[H3O+] = 2 x 10-14 M ? - -13.7
- Carbonated cola is more acidic than coffee or even orange juice because
cola contains phosphoric acid. - -7.59 × 10−4
- Rank the following from most acidic to least acidic. - -[H3O+]=10^-2
pH=3
pH=5
[H3O+]=10^-6
pH=14
- Label the following diagram of water molecules, indicating the location of
bonds and the partial charges on the atoms. - -
- Classify each statement as an example of adhesion, cohesion, or surface
tension. - -adhesion: water molecules cling to the side of a beaker, water
molecules cling to plant cell walls
cohesion: water molecules are attracted to each other, a drop of water
spilled on a table forms a drop on the table rather than spreading out over
the surface
surface tension: a water strider runs across a pond without breaking the
surface, a sewing needle floats when it is placed gently on top of water in a
buket
- The table shown here lists the specific heat of several substances.
water: 4.18,
ethyl alcohol: 2.44,
benzene: 1.80,
sulfuric acid
1.40
Exam Questions & Answers
What is the mass number of an ion with 107 electrons, 157 neutrons, and a
+1 charge? - -265
- What is the pH of an aqueous solution with the hydronium ion
concentration
[H3O+] = 2 x 10-14 M ? - -13.7
- Carbonated cola is more acidic than coffee or even orange juice because
cola contains phosphoric acid. - -7.59 × 10−4
- Rank the following from most acidic to least acidic. - -[H3O+]=10^-2
pH=3
pH=5
[H3O+]=10^-6
pH=14
- Label the following diagram of water molecules, indicating the location of
bonds and the partial charges on the atoms. - -
- Classify each statement as an example of adhesion, cohesion, or surface
tension. - -adhesion: water molecules cling to the side of a beaker, water
molecules cling to plant cell walls
cohesion: water molecules are attracted to each other, a drop of water
spilled on a table forms a drop on the table rather than spreading out over
the surface
surface tension: a water strider runs across a pond without breaking the
surface, a sewing needle floats when it is placed gently on top of water in a
buket
- The table shown here lists the specific heat of several substances.
water: 4.18,
ethyl alcohol: 2.44,
benzene: 1.80,
sulfuric acid
1.40
