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WorksheetsExam 1 review CHM 131
Total questions: 40
Worksheet time: 30mins
What does the prefix "centi" equal?
10-2
103
0.1
0.001
What does the prefix "deci" equal?
0.0001
0.01
0.1
10
What does the prefix "milli" equal?
0.001
10-4
104
0.01
What does the prefix "micro" equal?
10-2
10-7
0.00001
10-6
What does the prefix "deci" equal?
100
10
1
0.1
What does the prefix "kilo" equal?
1000
100
100000
10
In multiplication and division, what do you consider for significant figures?
The whole number
Only the numbers after the decimal place
Only the numbers before the decimal place
In addition and subtraction, where do you look to determine significant figures?
After the decimal place
Before the decimal place
The whole number
Which of the following only has two significant figures?
0.01
0.10
0.001
10
20.01 + 5.02400 = 25.034
Is this the correct number of significant figures?
Yes
No
3.0 x 5.00 = 15
Is this the correct number of significant figures?
Yes
No
When do you use scientific notation? (Select all that apply)
When the answer is very big
When the answer is very small
When you need to adjust sig figs
When you don't feel like writing out the whole number
Which unit is the largest?
millimeters
centimeters
micrometers
kilometers
Which unit is the smallest?
micrometer
meter
centimeter
millimeter
What conversions will be given to you on the exam? Select all that apply
Metric to metric
U.S. Customary to Metric
Celsius to Kelvin
calories to joules
If something has a density greater than water (>1 g/mL), it will....
Float
Sink
What are the standard units for density?
g/L
mg/L
g/mcL
g/mL
What is the equation for specific gravity?
density of water/density of sample
density of sample/ density of water
density of water/ density of solute
density of solute/ density of water
Which of the following is/are (an) exact number(s)?
4 legs on a chair
0.030 m
0.170 L
60 seconds in a minute
Which of the following is a pure substance?
Chocolate chip cookie
Nitrox
Table sugar
Copper wire
T/F: homogenous mixtures are uniform
True
False
What is kinetic energy?
sled on a hill
sled resting at the top of the hill
water behind a dam
a yoyo before its released
Which of the following is an example of potential energy?
burning fuel in a car
windmills
a raised weight
hydropower plants
T/F: change of state is a chemical change
True
False
T/F: Specific heat is the amount of heat needed to raise the temperature of exactly 10g of a substance by exactly
1°CTrue
False
Which of the following is an example of a chemical change?
Rolling pie dough thin
Tree cut into boards at a sawmill
Silver pin tarnishes
Chocolate bar melts
Which of the following is an example of a physical change? (Select all that apply)
Cutting a puzzle into 1000 pieces
Rusting of a car
Digesting food
Grating cheese
T/F: Oxygen has a greater atomic size than Sodium
True
False
T/F: Krypton has a lower ionization energy than Calcium.
True
False
Which element has the greatest atomic size?
Boron
Rubidium
Krypton
Lithium
Which color of light has the highest frequency?
Red
Blue
Purple
Yellow
In electron configuration, n=1 can hold how many electrons?
4
6
2
8
Atomic number is equal to..?
Number of electrons
Number of protons
Number of neutrons
Number of protons and neutrons
Mass number is equal to...?
Number of electrons
Number of neutrons
Number of protorns
Number of protons and neutrons
Which of the following is found on the periodic table?
Atomic mass
Mass number
Element symbol
Atomic number
T/F: Kelvin has units, they include a degree symbol
True
False
If the state is changing from liquid to solid, which would I use to find the number of Joules lost?
Heat of Vaporization
Heat of Condensation
Heat of Fusion
Specific Heat
Rubidium has an atomic mass of 85.47 and has two isotopes, rubidium-85, and rubidium-87. Which is most abundant?
85
86
87
Which of the following has the greatest ionization energy?
Ne
Na
K
Mg
Which of the following has the great atomic radius?
Cesium
Lead
Xenon
Fluorine
