Download Chemistry 100 G Homework 1

Chemistry 110 B
Winter 2016
Third Homework
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Finish studying Hill and McCreary Appendix A.3 and A.4 and Chapter 2.
Study Chapter 3 section 8. We will not study “electron configurations”.
Begin to study Chapter 3 sections 4, and 5.
Finish preparing for Quiz 1. This quiz will include topics on homework 1 and 2.
Prepare for the next lab.
Complete the lab report.
Complete the Study Group Assignment (see Homework 2).
Complete the Hazard Communication Module in Canvas. Use the OSHA Quick Cards.
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
centi
c
10−2
100 cg = 1 g
100 cm = 1 m
−3
milli
m
10
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”
The second quiz will include questions from the topics below and from the Hazard Communication
Module. To be prepared for the quiz, you should be able to answer these questions using only the
periodic table you received in class and the information given. Any quiz may include questions about
lab safety and procedures.
Due 8:30 am Tuesday, January 19. 10 Points.
Late homework is not accepted after 8:30 am Wednesday, January 20.
1. Properly record this measurement.
2. 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
3. How many significant digits 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
4. Perform these operations. Be sure to give answers with the correct number of digits. Do not forget
units!
a. 8.3 g + 3.76 g
b. 6.3 mL - 5.6 mL
c. 77.0 mL  8.059 g/mL
d. 12.17 g  10.570 mL
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5. Perform these conversions. Show your work.
a. Convert 77.3 g to kg.
b. Convert 105.0 mL to L
c. Convert 0.8050 dL to mL
d. Convert 8.43 kg to pounds. (1.000 pound = 0.4536 kg)
e. Convert 364 cm to µm.
6. A solid chain is copper colored. It has a volume of 28.9 mL and a mass of 243.6 g. Is the chain
pure copper? Justify your answer.
7. The density of liquid mercury is 13.53 g/mL.
a. What is the volume of 100.0 g of mercury?
b. What is the mass of 375 mL of mercury?
c. If you pour mercury in water, will the mercury sink or float?
8. Lavoisier proposed the Law of Conservation of Mass.
a. What does this law state?
b. Approximately when did Lavoisier propose this law?
9. 5.00 kg of charcoal is burned in a barbeque. Afterwards, 0.10 kg of solid ash is left.
What happened to the other 4.90 kg of matter?
10. Hydrogen reacts with oxygen to produce water. 3.00 kg of hydrogen will produce
26.8 kg of water. What mass of oxygen is used?
11. Answer Hill and McCreary Chapter 2 question 9 (on page 60).
12. Answer Hill and McCreary Chapter 2 problem 16 (on page 60).
13. When 1.0 kg of coal burns, only a couple grams of ash remain. This seems to
contradict the Law of Conservation of Mass. Explain what is actually happening.
14. Dalton proposed what we now call the Atomic Theory.
a. Approximately when did Dalton propose this?
b. At the time Dalton proposed it, would it have been called the “Atomic Theory”?
If not, what would it have been called?
15. Answer Hill and McCreary Chapter 2 question 11 (on page 60).
16. Which of these elements are in the same period as sulfur on the periodic table?
sodium, oxygen, chlorine, calcium
17. Which of these elements are in the same family, or group, as potassium?
sodium, arsenic, nitrogen, bromine
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18. What element has properties most similar to the properties of calcium?
19. In class you received a handout with information about the elements from hydrogen through
calcium and gallium through krypton. Use the information in this handout and a periodic table to
predict the properties of rubidium (Rb). Mass = 85.5 u. Predict the following:
a. Is Rb a metal, semi-metal, or nonmetal?
b. Density =
c. Hardness =
d. Molecules with hydrogen:
e. Chemical properties:
20. a. Which of the GHS pictrograms below is used when the product catches fire easily?
b. Which of the GHS pictrograms below is used when drinking the product can lead to brain
damage?
c. Which of the GHS pictrograms below is used when a short exposure to the product can be
fatal?
Image 1
Image 2
Image 3
Image 4
Atom from atom yawns as far
As moon from earth, or star from star
- "Atom from Atom" - Ralph Waldo Emerson -
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