Chemistry 110 - 02
Winter 2017
Second Homework
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Finish studying Chapter 1 sections 2, 5, 6, 7, and 8 of Hill and McCreary.
Study Appendix A.3 and A.4
Begin reading Chapter 2 of Hill and McCreary.
Complete the Lab Safety Quiz and turn it in on Monday, January 9.
Study for Quiz 1 on Friday, January 13. Quiz 1 will include topics from the First and
Second Homework including the chemical symbols.
Prepare for the second lab and write the first lab report.
Study Group Assignment
This assignment is worth three (3) points. Study with a study group. Your study group must
include 2 or 3 other students in this Chemistry 110 section. (That makes a total of 3 or 4 students.)
You must meet and study chemistry together for at least 45 minutes.
To receive the 3 points, you must individually turn in a sheet with the usual header (your name,
class section, etc), a list of the names of the other students in your study group, the date and time
when your study group met, and where the meeting occurred. You must also include one paragraph
in which you reflect on how useful meeting with the study group was for your understanding of the
information you studied. This is due the day of Quiz 2.
Typing hint:
In Word, the shortcut for superscript is <ctrl><shift>+. The shortcut for subscript is <ctrl>=.
Memorize the following metric prefixes, their symbols, and their meanings:
Prefix
Symbol
Meaning
Examples
3
kilo
k
10
1 kg = 1000 g
1 km = 1000 m
deci
d
10−1
10 dg = 1 g
10 dL = 1 L
−2
centi
c
10
100 cg = 1 g
100 cm = 1 m
milli
m
10−3
1000 mg = 1 g
1000 mL = 1 L
micro
µ
10−6
1,000,000 µg = 1 g
1,000,000 μL = 1 L
µ is the Greek letter “mu”
Learn the following metric units and their symbols. Know what they measure. Develop a sense of
how big they are.
1. meter (m), centimeter (cm), millimeter (mm) – use a ruler to help learn how long they are
2. liter (L), deciliter (dL), milliliter (mL) – use a measuring cup to help learn how large they
are.
3. gram (g), kilogram (kg) – a one liter bottle of water has a mass of about 1 kg. What is the
mass of a penny?
4. degree Celsius (oC) – ice water has a temperature of 0°C, boiling water has a temperature of
100°C, normal human body temperature is 37°C, room temperature is 20 - 25°C.
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Quiz 1 will include questions from the topics below and from the First Homework. To be ready for
the quiz you should be able to answer these types of questions using only the Periodic Table you
received in class. Quizzes may also include questions about lab safety. As part of your studying, I
recommend you write your own quiz based on the homework questions.
Due 7:30 am Wednesday, January 11. 10 Points.
Late homework is not accepted after 8:30 am Thursday, January 12.
1. Open Substances and Mixtures Question from the link on the class webpage (it’s under the
heading “For Homework 2”) and answer the questions. This is a Molecular Workbench
simulation. There are six parts, A – F.
2. Classify each of these as a compound or an element.
a. radon (Rn)
b. acetaminophen (C8H9NO2) c. propyl gallate (C10H12O5)
d. oxygen (O2)
3. Classify each of these as either a pure substance or a mixture.
a. silver
b. coffee
c. carbon dioxide
d. an apple
4. For each of these, indicate whether it is a pure substance or a mixture.
a. paint
b. carrot
c. hair
d. blood
5. NutraSweet® contains the compound aspartame. The chemical formula for aspartame is
C14H18N2O5.
a. What elements is a molecule of aspartame made of?
b. How many atoms are in one molecule of aspartame?
c. How many hydrogen atoms are in one molecule of aspartame?
d. Is aspartame an organic compound? (see page 250) Justify your answer.
e. Aspartame is also in Canderel®. Could the aspartame in Canderel be different than the
aspartame in NutraSweet? Justify your answer.
6. Open Chemical Change and Physical Change Question 1 and Chemical Change and
Physical Change Question 2 from the links on the class webpage (they are under the heading
“For Homework 2”) and answer the questions. These are Molecular Workbench simulations.
There are four parts, A – D.
7. Classify each of these as either a chemical change or a physical change.
a. An ice cube melts.
b. A banana ripens.
c. Gasoline burns.
8. Each of these is a property of the element sodium. For each, indicate whether it is a chemical
property or a physical property.
a. Sodium burns in chlorine gas, producing sodium chloride (table salt).
b. Sodium has a density of 0.968 g/mL.
c. Sodium is silvery-white.
d. When sodium is placed in water, bubbles of hydrogen gas are produced and the water
becomes very corrosive.
e. A block of sodium can be sliced with a knife, even though sodium is a metal.
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9. Give an example, common in your experience, that has the given property.
a. Something that has a mass of about 2 or 3 g.
b. Something that has a mass of about 1 or 2 kg.
c. Something that has a volume of about 1 or 2 L.
d. Something that has a volume of about 10 or 20 mL.
e. Something that has a temperature of about 20°C.
f. Something that has a temperature of about 100°C.
10. Properly record the following measurements.
c.
11. Properly record the following measurements.
a.
b.
12. How many decimal places does each of these measurements have?
a. 24.3 g
b. 10.534 L
c. 0.05173 mm
d. 8.30 kg
e. 0.09040 m
13. According to the class syllabus, which of these account for 14 points of the 20 points possible
for the lab notebook?
Having a thread-bound notebook. Not tearing out pages. Writing
observations directly into the notebook. Using black or blue permanent
ink. Crossing out mistakes with a single line. Including units. Including a
Table of Contents. Numbering each page. Writing the date on every page.
Not skipping pages. Starting each lab on a new page.
His life was gentle, and the elements
So mixed in him that Nature might stand up
And say to all the world, "This was a man."
- from Julius Caesar - William Shakespeare -
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