Sig Figs
Scientific Notation
Measurement
Labs, labs, labs
Matter Review
Randos
Accuracy vs Precision
100
The number of significant figures:
2,987
What are 4?
100
Convert the number to scientific notation:
0.00199
What is 1.99 x 10-3
100
Determine the mass in grams:
What is 263.3 grams?
100
The color of copper (II) sulfate pentahydrate before heating.
What is blue?
100
Determine the classification of orange juice with pulp.
What is a heterogenous mixture?
100
The number of cm in a meter.
What is 100?
100
Describe the accuracy and precision.
What is high precision and low accuracy?
200
The number of significant figures:
58,000
What is 2?
200
Convert the number to standard notation:
2.998 x 108
What is 299,800,000?
200
The number of millimeters in this graduated cylinder.
What is 76.0 ml?
200
The number of water molecules in copper (II) sulfate pentahydrate.
What are five water molecules?
200
Determine the correct matter classification of gold.
What is an element or pure subbstance?
200
You and your friend go to the movies and he says that he counted 153 people in the movie theater. He rounds that number to 150 and says that the number should have 2 sig figs. Determine if he is correct and incorrect and explain why.
What is incorrect? He counted the people and counting does not use sig figs.
200
Describe the accuracy anf precision.
What is low accuracy and low precision?
300
The number of significant figures:
10,465
What is 5?
300
Convert the number to standard notation:
7.12 x 10-2
What is 0.0712?
300
The number of millimeters in this graduated cylinder.
What is 2.51 ml?
300
The chemistry law that best describes that the formula of copper (II) sulfate pentahydrate is always the same.
What is LDC (law of definite composition)?
300
Determine the correct matter classification of sodium chloride (NaClO3).
What is a compound or pure substance?
300
You pick up an ice cream sandwich from the school cafeteria and stick it in your hoodie pocket so your hands are free to hand the cash over to the cafeteria worker. You run into your chem lab partner on your way to your seat, and he tells you your homework is due next period. You forget all about your ice cream until you pull the plastic full of mush out of your pocket later that afternoon.
Determine if this is a physical or chemical change.
What is a physical change?
300
Jack, a snack food manufacturer, produces bags of potato chips, each measuring 11 oz. He tests the weight of the bags using a scale. There is a slight variation in the measurements: 12.2 oz, 12.33 oz, and 12.13 oz for three samples. Describe the accuracy and precision of Jack's measurements.
What is low accuracy, high precision?
400
The number of significant figures for the following addition problem:
0.00873 + 0.035
What is 2?
Answer is 0.044
400
Convert to scientific notation with correct sig figs?
0.00880000 x 0.00558
What is 4.91 x 10-5?
400
The length of the pencil in centimeters.
What is 4.10 cm?
400
The average mass of one paper clip if five paper clips have a mass of 3.267 grams.
What is 0.6534 grams?
400
Determine the correct matter classification of bronze. Bronze is an alloy of copper and tin.
What is a homogenous mixture?
400
A football team scores 3 touchdowns, misses 1 extra point, scores 2 field goals and a safety. Determine the total number of points scored.
What is 28 points?
400
The following measurements were made to determine the density of a material whose value was, according to the Handbook of Chemistry and Physics, 1.15 g/mL
Trial #1 0.95 g/mL
Trial #2 1.16 g/mL
Trial #3 1.38 g/mL
Describe the accuracy and precision of these measurements.
What is low accuracy and low precision?
500
The number of significant figures for the following multiplication problem:
102,430 x 60.0
What is 3?
Answer is 6,150,000
500
Convert to standard notation with the correct sig figs:
5.15 x 10-5 + 3.2 x 105
What is 3.2 x 105?
500
The temperature reading of the thermometer in degrees Celsius.
What is 6.5 degrees Celsius?
500
The name of unpopped popcorn kernels:
a. old maids
b. no shows
c. der puffmais
d. calico corn
What are old maids?
500
Determine the classification of the particle diagram.
What is a compound, or pure substance?
500
Determine the name of the very large number above my whiteboard.
What is a mole?
500
A student took a calibrated 200.0 gram mass, weighed it on a laboratory balance, and found it read 196.5 g. Determine the student’s percent error.
What is 1.75%?