Unit 1 Review
Measurements
How to Study for a Chemistry Test(which you should definitely do - duh)
• If it is in your Unit Packet, you need to know it.
– Over 90% of all information on your tests will come from the unit packets.
• Common vocabulary terms & metric prefixes
• Relevant equations (density, volume, % error)
• Homework questions and problems
– Actively study this does not mean reading your notes over a couple of times! That is useless!
• Re-do class examples and homework problems, and then check your answers with the correct ones.
• Use your resources (class examples, text book, WY Chemistry YouTube Page, Moodle quizzes)
The amount of matter in an object describes its
A. Volume
B. Mass
C. Density
D. Weight
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Which of the following is not a unit of volume?
A. Liter
B. Gallon
C. Cubic centimeter
D. Square foot
E. teaspoon
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What would be a correct reading of the liquid in the picture?
Acceptable Answers:
2.64mL
2.65mL
2.66mL
2.67mL
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Water is reported to have a density of 0.9971 g/ml. If the following are your lab results, what is your % error?Trial 1: 0.981 g/ml Trial 2: 0.982 g/ml Trial 3: 0.984 g/ml
1.5%
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This ruler has a precision of.
cm
A. +/- 10 cm
B. +/- 1 cm
C. +/- 0.1cm
D. +/- 0.01 cm
E. +/- 0.001 cm
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Which of the following would be a correct reading of the liquid in the picture?
35.0 mL
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How many cg is 33.1 kg?
3,310,000 cg
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Sam uses a beaker to measure a volume of water to be 430 mL. Which of the following represents the range of the water he has?
A. 429.9 – 430.1mL
B. 429 – 431 mL
C. 420 – 440 mL
D. 400 – 500 mL
E. 300 – 500 mL
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Which of the following would be a correct reading of arrow B in the picture?
330 cm
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Which one of the following gives a measure of precision ?
A. Average Deviation
B. Q Test
C. Percent Error
D. Absolute Error
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Which of the following would be a correct reading of object C in the picture below?(It is exactly on the line)
4Ō cm
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Water is reported to have a density of 0.9971 g/ml. If the following are your lab results, what is your average deviation?Trial 1: 0.996 g/ml Trial 2: 0.982 g/ml Trial 3: 0.988 g/ml
0.005 g/mL
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A jiffy is defined as 0.010 seconds. How many kilojiffies are in 2.5 hours?
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A. 15
B. 150
C. 90
D. 900
E. 9.0 x 102
F. 900,000
• A shoe box is 29.5cm long, 18.0cm wide, and 0.095m tall. Determine the volume of the shoe box, and convert it into Liters.
• Set up a T-Chart and data table like you would on the exam tomorrow.
5.04 L
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What is 31,120 g/mL divided by 85.9 g ?
A. 362 g
B. 362 mL
C. 362 /mL
D. 362 g2/mL
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3700 cm3 would be equal to how many liters?
3.7 L
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7560 cm would be equal to how many meters?
75.6 m
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The percent error is calculated to..
A. Determine if a measurement can be thrown out
B. Show the accuracy of your experiment
C. Show the precision of your experiment
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Which of the following describes the amount of kinetic energy in an object?
A. Volume
B. Mass
C. Density
D. Temperature
E. Weight
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Convert 32,000 kg into mg.
A. 32 mg
B. 3.2 mg
C. 32,000,000 mg
D. 3,200,000,000 mg
E. 32,000,000,000mg
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What is the density of an object with a mass of 34,000 g, a length of 2.3 meters, a width of 84 cm, and a height of 8 cm?
0.22 g/cm3
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Mercury has a density of 13.53 g/mL. How much space does 5430 g of Hg occupy?
401 mL
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What is the volume in centiliters of a 3,472.30 cm3 object?
347.23 cL
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What is the mass of an object that takes up 14.0 liters of space and has a density of 0.0195 g/mL?
273g
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The mass of a proton is reported to be 1.00728 amu. What is your percent error?Trial 1: 0.9960 amu Trial 2: 1.0024 amu Trial 3: 1.0053amu
0.60 %
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1. Average deviation measures the _____ of a group of measurements.
2. Precision is how ____ ____ the results of each trial are.
3. Does good precision always mean your experiment is accurate?
4. If a data point looks “off” what could be done to verify if that data point is bad and should be thrown out?