For Fungsu Physics Homework
Otrava50
gcu-style-guide-template_8.doc1
Ivy Bucsa
Psy- 102
September 14, 2014
Lillian Flakes
Chapters 14,15,16 and 17 Review
Chapter14
Excercises
43. Classify each of the following as a homogeneous mixture,
heterogeneous mixture, element, or compound:
(a) table salt, (b) blood, (c) steel, (d) planet Earth.
52. If nitrogen, N2, were pumped into your lungs at high
pressure, what would happen to its solubility in your
blood?
56. Why is rain or snow called precipitation?
69. Cells at the top of a tree have a higher concentration of
sugars than cells at the bottom. How might this fact
assist a tree in moving water upward from its roots?
Readiness Assurance Test
4. Half-frozen fruit punch is always sweeter than the same
fruit punch completely melted because
(a) the sugar sinks to the bottom.
(b) only the water freezes while the sugar remains in
solution.
(c) the half-frozen fruit punch is warmer.
(d) sugar molecules solidify as crystals.
Chapter 15
Read and Check
6. Why does the fluorine atom tend to gain only one electron?
24. What is the primary difference between a chemical bond
and an attraction between two molecules?
Exercise
66. Which is stronger: the covalent bond that holds atoms
together within a molecule or the electrical attraction
between two neighboring molecules? Explain.
Readiness Assurance Test
1. An atom loses an electron to another atom. Is this an
example of a physical or chemical change?
(a) chemical change involving the formation of ions
(b) physical change involving the formation of ions
(c) chemical change involving the formation of covalent
bonds
(d) physical change involving the formation of covalent
Bonds
2. Aluminum ions carry a 3+ charge, and chloride ions
carry a 1- charge. What is the chemical formula for the
ionic compound aluminum chloride?
(a) Al3Cl
(b) AlCl3
(c) Al3Cl3
(d) AlCl
Chapter 16
Reading Check
5. How is a solution different from a suspension?
11. Why does the solubility of a gas solute in a liquid solvent
decrease with increasing temperature?
Exercises
40. Mixtures can be separated into their components by taking
advantage of differences in the chemical properties of
the components. Why might this separation method be
less convenient than taking advantage of differences in
the physical properties of the components?
42. Many dry cereals are fortified with iron, which is added
to the cereal in the form of small iron particles. How
might these particles be separated from the cereal?
43. Classify each of the following as a homogeneous mixture,
heterogeneous mixture, element, or compound:
(a) table salt, (b) blood, (c) steel, (d) planet Earth.
46. Which of the boxes above best represents a suspension?
48. Which of the boxes above best represents a compound?
Chapter 17 Read and Check
14. What generally happens to the rate of a chemical reaction
with increasing temperature?
Exercises
46. Balance these equations:
(a) ____Fe(s) + ____O2(g)h____ Fe2O3(s)
(b) ____H2(g) + ____N2(g)h____NH3(g)
(c) ____Cl2(g) + ____KBr(aq)h____Br2(l ) +
____KCl (aq)
(d) ____CH4(g) + ____O2(g)h____CO2(g) +
____H2O(l )
48. Which of these two chemical equations is balanced?
2 C4H10( g) + 13 O2( g)h8 CO2( g) + 10 H2O(l )
4 C6H7N5O16(s) + 19 O2( g)h24 CO2( g)
+ 20 NO2( g) + 14 H2O(g)
Discussion Questions
81. Many people hear about atmospheric ozone depletion
and wonder why we don’t simply replace the ozone that
has been destroyed. Knowing about chlorofluorocarbons
and knowing how catalysts work, explain how this would
not be a lasting solutions.
Readiness Assurance Test
5. The yeast in bread dough feeds on sugar to produce
carbon dioxide. Why does the dough rise faster in a
warmer area?
(a) There is a greater number of effective collisions
among reacting molecules.
(b) Atmospheric pressure decreases with increasing
temperature.
(c) The yeast tends to “wake up” with warmer temperatures,
which is why baker’s yeast is best stored in
the refrigerator.
(d) The rate of evaporation increases with increasing
temperature.
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