1
Lecture Problems CHAPTER 2
Temperature Conversion Problems:
1. The temperature in this room is 26oC, convert to Kelvin.
2. The temperature outside is 333K, convert to Centigrade.
Significant Figures
Chem 111-Worksheet Chapter 6-1
1. Chemical energy is
A) the energy stored within the structural units of chemical substances.
B) the energy associated with the random motion of atoms and molecules.
C)
DIMENSIONAL ANALYSIS PROBLEMS
1. A baseball is thrown at a rate of 89.6 miles per hour. What is the speed in meters
per second?
(89.6 Mi/hr)(1 hr/60 min)(1 min/60s)(1.6093km/mi)(1000m/1 km) = 40.1m/s
1
Chapter 2: Measurement and Problem Solving
UNITS OF MEASUREMENTS:
Observations: Qualitative measurements (the man is tall)
Quantitative measurements (the man is 80.5 inches tall)
Measurements consis
Chemistry 101 Chapter 2 Practice Problems Answer Key
1. Express each of the following numbers in scientific (exponential) notation.
a. 12,500
b. 37,400,000
c. 0.0202
d. 0.0000104
1.25 x 104
3.74 x 107
General Chemistry 2
Name(s)
Lab 8: Cu Isolation
Class ID
Date
OBJECTIVES
Students can use Ksp to determine product losses in washing steps.
Students use percent yield to determine efficiency of lab pr
Key
Review Unit 2
. Rewrite the following in scientiﬁc notation.
a. 433 7.53; >4. M.) 2
b. 1,110,000,000 M / 209
C. Z .62 king“?!
d. 0.000104 J,
/-0‘/ )4 i0
. How many sig ﬁgs are in each of the numbe
Reading a Graduated Cylinder Accurately
Expert Information: A graduated cylinder is used to measure liquid volume. The unit is the
milliliter, abbreviated mL. To use a graduated cylinder, you must rem
Graduated Cylinders
Graduated cylinders are the tools commonly used to make
moderately precise measurements of volumes in the laboratory. The volumes can be measured to 3 signicant digits if
care is t
MEASUREMENT
Qualitative measurements - the man is tall
Quantitative measurements - the man is 80.5 inches
tall
What Is a Measurement?
Quantitative
observation.
Comparison to an
agreed upon standard.
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Chapter 1: The Chemical World
Definition of Chemistry:
Chemistry: It is the study of properties of materials and changes that they undergo. It can be
applied to all aspects of life (e.g., developmen
Chemistry 101 Chapter 2 Practice Problems Answer Key
1. Express each of the following numbers in scientific (exponential) notation.
a. 1.25 x 104
b. 3.74 x 107
2. Express each of the following as an o
Significant Figures Worksheet
1. Underline the significant zeros in the following numbers.
5.08_
508_
5.080 X 103_
0.05080_
50800_
2. State the number of significant digits in the following measuremen
Chemistry 101 Chapter 2 Homework
1. Express each of the following numbers in scientific (exponential) notation.
a. 12,500_
b. 37,400,000_
c. 0.0202_
d. 0.0000104_
2. Express each of the following as a
Extra Dimensional Analysis Problems
1.
An average adult has 6.0L of blood. The Red Cross usually takes one pint of blood from
each donor at a donation. What is the percentage by volume of a persons bl
Extra Dimensional Analysis Problems
1.
An average adult has 6.0L of blood. The Red Cross usually takes one pint of blood from
each donor at a donation. What is the percentage by volume of a persons bl
Chemistry 101
Chapter 2 Quiz
10 points
1.
(1 pt) A student needs 15.0 mL of ethanol for an experiment. If the density of the
alcohol is 0.789 g/mL, how many grams of alcohol are needed?
2.
(1 point) W
Christina Adjiman
Khanh Phan
Tri Phan
CHE 112 001
Dr. Joel Thompson
April 19, 2017
Lab Report 9: Voltaic Cells
I.
INTRODUCTION
A Voltaic Cell is a system which produces electricity using the chemical