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WorksheetsIntro to Chemistry
Total questions: 15
Worksheet time: 18mins
This refers to how close a measured value is to an accepted value.
accuracy
error
percent error
precision
This refers to how close a set of measurements are to one another.
accuracy
error
percent error
precision
This is the difference between a measured value and an accepted value.
accuracy
error
percent error
precision
This is the ratio of error to an accepted value.
accuracy
error
percent error
precision
This is the value obtained by measurement or experiment.
experimental value
theoretical value
This is the accepted value or standard.
experimental value
theoretical value
The accepted boiling point of a substance is 90 degrees Celsius. During a lab a student records the boiling point at 91 degrees Celsius. What is the percent error?
90 degrees Cesius
91 degrees Celsius
1 degree Celsius
1.098%
Which is the correct formula for density?
Density = mass + volume
Density = mass - volume
Density = mass x volume
Density = mass / volume
The mass of an object is 10 grams and the volume is 5 mL. What is the density of the object?
15 g/mL
5 g/mL
50 g/mL
2 g/mL
An object is placed in a graduated cylinder and the water level rises from 50 mL to 60 mL. The mass of the object is 20 grams. What is the density of the object?
30 g/mL
10 g/mL
200 g/mL
2 g/mL
How many significant figures does the number 0.002570 have?
3
4
5
6
How many significant figures does the number 4550 have?
1
2
3
4
Which answer correctly shows 18934000 in scientific notation?
1.8934 x 10-7
18.934 x 10-6
1.8934 x 107
18.934 x 106
Which answer shows the product of 344 x 1.8 using the correct number of significant figures?
620
619
619.2
600
Which choice shows the correct answer?
8.0 x 106 / 2.0 x 104
4.0 x 1010
4.0 x 106
4.0 x 104
4.0 x 102
