


Pathway
4: Chapter 1 Homework/Study Pack 



Part A: Significant
Figures Answers Projects
Required (Chapter 1): Project
#2 Measurement via Gasoline
Project
(due August 19^{th})
Part
A: Significant figures Sample Exam
Answers Answers
For a very detailed Explanetion of
Significant Figues in the Laboartory: Significant Digit
Animation: John
Suchocki Video:
Mobile/Cell Phone Link: http://bcove.me/xlhukfnu Path
4 Part A Sample Exam Sample
Exam Answers: In the blank, state the number of significant
figures in each of the following measurements: ____1. 0.05 mL ____2. 250.0 cm ____3. 456,000,000 people _____4. 1000 g _____5. 0.00006500 moles _____6. 0.00200 kg _____7. 50 seconds _____8. 50.0 Seconds _____9. 50.00 Seconds _____10. 0.05 Seconds Part
B: Rounding Off & Arithmetic Operations of Sig. Figures Answers Part B: Rounding Off
& Arithmetic Operations of Sig. Figures Answers Round off the following numbers to three
significant figures: (1) 1.598 x 10^{6 }=
_____________ (2) 0.000 000 484 500 = _________________ (3)
0.01045 = _______________ (4)
1.98754 X10^{7} =
________________ Perform the following
addition/subtraction/multiplication/division operations and express the
answer using the proper units and significant figures: (5)
4 mL
16.3 mL + 0.953 mL (6) 376.5
mL  76
mL (7)
16.5 cm X 1.7 cm (8) 12.0 g ÷
1.00 g = or 12.0 g / 1.00 g = (9)
9.2 cm X 9.20 cm
X 3.14 X 22.65cm
= (10)
(5398 cm^{3} – 2060.2 cm^{3}) /16.8 cm^{3}/sphere = Path
4 Chapter 2 Part C: Exponential Numbers and Scientific Notation Answers
John Suchocki Video:
Video 1.6 a. Scientific Notation (Conceptual Chemistry 5^{th}
Appendix A) Path
4 Chapter 2 Part C: Exponential Numbers and
Scientific Notation Answers Express the following ordinary numbers in
scientific notation (If greater than three significant figures, round off to
three significant figures: (1)
1,010,100,000,000, 000 =
________________ (2)
0.000 000 000 000 019 = ________________ (3)
456,789 = _________________ (4)
0.0001198 = _____________ (5)
1,000,000 = ______________ (6)
0.000200 = ______________ (7) Express the following products in exponential form 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 =
______________ (8) and use your calculator to calculate the
value: Value = ___________________ (9)
Express the following powers often notation: 1 x 10^{0} = ______ 1 X 10^{1}=______ 1 x 10^{1} = _________ (10) Express the ordinary number in
scientific notation in three significant figures: 60,230,000,000,000,000,000,000 = _______________________ Path 4 Part D: Metric System Basic
Units/Numerical Prefixes Answers John Suchocki Video:
Mobile/Cell Phone Link: http://bcove.me/bnei9533 Path 4 Chapter 1 Part D: Metric
System Basic Units/Numerical Prefixes Fill
in the blank with the proper basic unit or metric prefix, then in the parenthesis
put the unit’s or ____________( )
1. Basic unit of length in the metric system ____________( )
2. Basic unit of volume in the metric system ____________( )
3. Basic unit of mass in the
metric system (not SI) __________( )
4. Metric prefix which means 1/1000 of a unit __________( )
5. Metric prefix which means 1000 units __________( )
6. Metric prefix which means 1/100 of a unit __________( )
7. Metric prefix which means
1/10 of a unit __________( )
8. Metric prefix which means
1,000,000 units __________( ) 9.
Metric prefix which means 1/1000000 ( 10^{6}) of a unit __________( )
10. Metric Prefix which means 1/1000000000 ( 10^{9}) of a unit Metric Prefix Table: http://www.lsua.info/MetricSystem/MetricPrefix.html Metric System Animation: http://www.lsua.info/chem1001/Chap23Movies/metric.html Path 4 Chapter
1 Part E Metric Unit Factors Answers
Fill in the blank with the number which
completes the metric unit factor: (1)
__________mg = 1.000 g (2)
__________mg = 1.000 kg (3)
__________mL = 1.000 L (4)
__________cm = 1.000 m (5)
___________mL = 1.00 cm^{3} (6)
____________km = 1.000 m (7) ____________ g = 1
kg (8) ____________ cm = 1 dm (9) ___________ µL = 1 L (10) __________ nm = 1 m (11)
Write a unit equation for each of the following metric equivalents: (a) M and
Tm (b) L and mL (c) Bytes and Gbytes (a) Path 4
Chapter 1 Part F: Unit Analysis Problems
Online Dimensional Analysis Web Site &
Interactive DA Calculator: John Suchocki Video: Mobile/Cell Phone Link: http://bcove.me/anfsogbq Path 4 Chapter 1 Part
F: Unit Analysis Problems Answers Pretest #2 Ans2
Online
Site
(If greater than three significant figures
round off to three significant figures): Problem 1 An oxygen molecule
travels 975 mi/hr at room temperature. There are
5280 ft = 1 mi; 12 in = 1 ft,
Problem 2 If one gram is equal
to 15.4 grains. How many 5.00 grain aspirin tablets may be made from 1.00
kilogram of aspirin?
A parsec is the
distance light travels in 3.26 years. Given the velocity of light, 3.00 x 10^{8}
m/sec,
I have 1400 radio
programs I want to put on an Apple Ipod. Each
program requires 5 megabytes of disk space. Step
by Step Answers to Problems #1#4: John Suchocki Video:
Mobile/Cell Phone Link: http://bcove.me/anfsogbq Additional Videos Online
Menu: http://www.fscj.me/chm1025/Video/Chapter2VideoMenu.html Additional Unit
Analysis Problems Problem 5 Problem 6 Problem 7 Problem 8 More Additional Unit
Analysis Problems Problem 9 How many
milligrams does a 0.750 carat diamond weigh? Problem 10 Problem 11 Setup and Answers to Problems
#1#12: The
Ultimate Word Problem with too many numbers which are not needed: The True Story Now the Problem 12 Problem Reworded Problem
12 12. On July 23, 1983 Air Canada Flight
143, flying at 26,000 feet from Montreal to Edmonton, Setup and Answers to Problems #1#12: 



Path
4 Chapter 1 Part S: The Scientific Method
Good Flow Chart:
The
scientific method consists of:
Theories are seldom finished and are generally refined
to a higher level of confidence as new data and better observation tools are
developed. As an example, the Greeks developed the first atomic theory and John
Dalton refined the theory as a hypothesis which has continued to be refined
into the current state of modern atomic theory. The scientific method is never
a finished process but one that is continuously improving the explanation of
nature’s behavior as methods and instruments improve.
Simple Scientific Method Steps (Corwin
7^{th})
Step 1: Perform a planned experiment,
make observations, and record data.
Step 2: Analyze the data and propose a
tentative hypothesis to explain the experimental observations.
Step 3: Conduct additional experiments
to test the hypothesis. If the evidence supports the initial proposal, the
hypothesis may become a scientific theory
•
After sufficient evidence, a hypothesis
becomes a scientific theory.
•
A natural law states a
measurable relationship.
Corwin’s Simple Scientific Method Flow
Chart:
Scientific Method Four Steps (Hein 15^{th})
Learning Chemistry
•
Different people learn chemistry
differently.
•
What do you see in the picture?
•
Some people see a vase on
a dark background; some people see two faces.
What Do You See? A Vase
or Two Faces
Chapter 1 Part S: The Nine Penny Problem (Background)
Over the
years the United States Ming has changed the ratio of different metals used in
making the various coins. The last
change for the penny occurred in 1982. It is estimated that there are 200
billion pennies in current circulation.
Following is a brief chronology of
the metal composition of the onecent coin (penny):
Current Penny: 
Specifications: Composition: CopperPlated Zinc: 2.5%
Cu, Balance: Zn 97.5 % Mass: 2.500 g Diameter: 0.750 in., 19.05 mm Thickness: 1.55 mm
Edge: Plain 
In 1990, United States Representative Jim Kolbe (RAZ) introduced the Price Rounding Act of 1989, HR 3761 to eliminate the penny in cash transactions, rounding to the nearest nickel.^{[3]} In 2001, Kolbe introduced the Legal Tender Modernization Act of 2001, HR 5818,^{[4]} and in 2006, he introduced the Currency Overhaul for an Industrious Nation (COIN) Act, HR 5818.^{[5]} While the bills received much popular support from the public, and therefore from their representatives, the bills were not made to law when Congress adjourned.^{[6]} There are public pressures on many Representatives to reintroduce these bills to the legislature. One such example is the constituency of the 2nd District of Colorado, represented by Jared Polis.^{[7]}
Nine
Penny Problem with The Two Pan Balance:
You have nine pennies. Eight of the pennies are post 1982 dated, therefore
they weight 2.500 grams eash.
You have one penny with a 1974 mint date and it weighs
3.100 grams.
You need to design and write
the directions for an experiment on how you would use the above balance to find
100% of the time, the heavier 1974 penny:
1.Write the directions below as steps Only what is the number
of weighing needed in your this procedure below:
Step 1:
Step 2:
Step 3:
Step 4:
Step 5:
Step 6:
Step 7:
Step 8:
How many weighing would use
use maximum to sove the problem:
One Two Three
Four Five
2. Now rewrite the experiment so that it will take a
different Number of weighings
Write the directions below as
steps Only what is minimal needed) in you procedure:
Step 1:
Step 2:
Step 3:
Step 4:
Step 5:
Step 6:
Step 7:
Step 8:
How many weighing would use
use maximum to sove the problem:
One Two
Three Four Five
3. Now try to rewrite the experiment so that it will take a
different Number of weighings than #1 or #2
Path 4: Chapter 2
Part S: Scientific Method Sample Test
A. State Three Steps in the Scientific Method according by the Corwin Text:^{}
1.
2.
3.
Fill
in the words on the Corwin Simple Scientific Method Flow Chart
B. State Four Steps in the Scientific Method according
by the Hein Text:
1.
2.
3.
4.
Fill
in the words on the Hein Simple Scientific Method Flow Chart
•
Connect the dots using only four
straight lines.
Experiment
until
you find a solution
•
Connect the dots using only four
straight lines.
•
Experiment until you find a solution.
•
Did you have to use five straight
lines?
•
No matter which dot we start with, we
still need five lines.
Path 4 Chapter 1 Part V: Chapter 1
Vocabulary
The following Chapter Vocabulary terms may be found at the end of Chapter 1:
Summer of Terms page 19.
Fill
in the blank(s) with the word that best fits the definition (Chapter 1
1. ___________________ A type of research that focuses on developing
applications of knowledge
gained through basic research.
2. ___________________ A type of research that leads us to a greater
understanding of how the natural world operates.
3. ___________________ The study of matter and the transformations it
can undergo.
4. ___________________Something
agreed upon by competent observers as being true.
5. ___________________
Anything that has mass and
occupies space.
6. ___________________ An area where we engineer materials by manipulating
individual atoms or molecules.
7. _______________________A testable explanation for an observable phenomenon.
8. ___________________ A formal statement of a scientific hypothesis that has
been
repeatedly tested and supported by
experimental data. Also known as a principle.
9. ___________________ A
welltested explanation that unifies a broad range of observations within the
natural world
Additional vocabulary terms
not in the Chapter 1 Summary:
10___________________A
scientific procedure undertaken to make a discovery, test a hypothesis, or
demonstrate a known fact.
11. ___________________ is a systematic
investigation of nature and requires proposing an explanation for the results
of an experiment in the form of a general principle
Part Z. Conceptual Chemistry Spotlight:
Chapter 1: Global Climate Change
Reference::
http://www.numericana.com/answer/weighing.htm#birthday
https://upload.wikimedia.org/wikipedia/commons/8/82/False_Coin_Problem.gif