Notes

5.0/ 5.0 Points
A student estimated a mass to be 250 g but, upon carefully measuring it, found the value to be 240 g. What is the percent error of the estimated mass if the measured value is the accepted one?
A. 4.0%
B. -4.2%
C. -4.0%
D. 4.2%


Question 2 of 20 5.0/ 5.0 Points
The smallest volume from among the following is:
A. 25 mL.
B.
1.6 x 10-2 L

C. 0.012 L.
D.
18 cm3.



Question 3 of 20 5.0/ 5.0 Points
Identify the activity that belongs in the field of chemistry.
A. developing medicines
B. analysis of a compound
C. production of a new plastic
D. all of the above


Question 4 of 20 5.0/ 5.0 Points
A hypothesis is
A. a proposed explanation for what is observed.
B. an observation recorded from an experiment.
C. a well-tested explanation for many observations.
D. a summary of the results of many experiments.


Question 5 of 20 5.0/ 5.0 Points
How many of the zeros in the measurement 0.050060 m are significant?
A. 1
B. 2
C. 3
D. 4


Question 6 of 20 5.0/ 5.0 Points
How many significant figures are in the measurement 603.040 g?
A. 3
B. 4
C. 5
D. 6


Question 7 of 20 5.0/ 5.0 Points
The measurement 4.06 x 10-5g represents:

A. 0.0000406 g.
B. 406000 g.
C. 0.00000406 g.
D. 40600000 g.


Question 8 of 20 0.0/ 5.0 Points
A reproducible measurement is an accurate one.
A. True
B. False


Question 9 of 20 5.0/ 5.0 Points
The largest number from among the following is:
A.
1.80 x 10-4

B.
1.80 x 10-8

C.
1.80 x 10-2

D.
1.80 x 10-6



Question 10 of 20 0.0/ 5.0 Points
Which of these steps of the scientific method involves stating a relationship but not proposing an explanation for the relationship?
A. hypothesis
B. scientific law
C. theory
D. observation


Question 11 of 20 5.0/ 5.0 Points
Which of the following is not a part of the scientific method?
A. proving
B. observing
C. hypothesizing
D. experimenting


Question 12 of 20 5.0/ 5.0 Points
One milliliter occupies the same volume as one cubic centimeter.
A. True
B. False


Question 13 of 20 5.0/ 5.0 Points
Chlorine boils at 239 K. What is the boiling point of chlorine expressed in degrees Celsius?
A. 93°C
B. 34°C
C. –61°C
D. –34°C


Question 14 of 20 5.0/ 5.0 Points
Which of the following is the correct scientific notation for 0.00000862?
A.
8.62 x 10-6

B.
8.62 x 106

C.
8.62 x 10-7

D.
8.62 x 107



Question 15 of 20 5.0/ 5.0 Points
According to the rules of significant figures, the number of digits that are estimated in a measurement is:
A. one.
B. two.
C. three.
D. none.


Question 16 of 20 0.0/ 5.0 Points
Any zero in a measurement is always significant.
True
False


Question 17 of 20 5.0/ 5.0 Points
Which of these equalities is correct?
A. 1 mm = 10 cm
B. 1 L = 1000 mL
C. 1 cm = 100 m
D. 1 g = 1000 kg


Question 18 of 20 5.0/ 5.0 Points
Which of these chemicals is definitely inorganic?
A. one that is made of carbon and oxygen
B. one that is made of nitrogen and hydrogen
C. one that is made of nitrogen and carbon
D. one that is made of carbon and hydrogen


Question 19 of 20 5.0/ 5.0 Points
The number of seconds in a 40-hour work week can be calculated as follows:
A.


B.


C.


D.




Question 20 of 20 5.0/ 5.0 Points
The metric prefix milli- means:
A. 100 times smaller.
B. 1000 times larger.
C. 1000 times smaller.
D. 100 times larger.





5.0/ 5.0 Points
A student estimated a mass to be 250 g but, upon carefully measuring it, found the value to be 240 g. What is the percent error of the estimated mass if the measured value is the accepted one?
A. 4.0%
B. -4.2%
C. -4.0%
D. 4.2%


Question 2 of 20 5.0/ 5.0 Points
The smallest volume from among the following is:
A. 25 mL.
B.
1.6 x 10-2 L

C. 0.012 L.
D.
18 cm3.



Question 3 of 20 5.0/ 5.0 Points
Identify the activity that belongs in the field of chemistry.
A. developing medicines
B. analysis of a compound
C. production of a new plastic
D. all of the above


Question 4 of 20 5.0/ 5.0 Points
A hypothesis is
A. a proposed explanation for what is observed.
B. an observation recorded from an experiment.
C. a well-tested explanation for many observations.
D. a summary of the results of many experiments.


Question 5 of 20 5.0/ 5.0 Points
How many of the zeros in the measurement 0.050060 m are significant?
A. 1
B. 2
C. 3
D. 4


Question 6 of 20 5.0/ 5.0 Points
How many significant figures are in the measurement 603.040 g?
A. 3
B. 4
C. 5
D. 6


Question 7 of 20 5.0/ 5.0 Points
The measurement 4.06 x 10-5g represents:

A. 0.0000406 g.
B. 406000 g.
C. 0.00000406 g.
D. 40600000 g.


Question 8 of 20 0.0/ 5.0 Points
A reproducible measurement is an accurate one.
A. True
B. False


Question 9 of 20 5.0/ 5.0 Points
The largest number from among the following is:
A.
1.80 x 10-4

B.
1.80 x 10-8

C.
1.80 x 10-2

D.
1.80 x 10-6



Question 10 of 20 0.0/ 5.0 Points
Which of these steps of the scientific method involves stating a relationship but not proposing an explanation for the relationship?
A. hypothesis
B. scientific law
C. theory
D. observation


Question 11 of 20 5.0/ 5.0 Points
Which of the following is not a part of the scientific method?
A. proving
B. observing
C. hypothesizing
D. experimenting


Question 12 of 20 5.0/ 5.0 Points
One milliliter occupies the same volume as one cubic centimeter.
A. True
B. False


Question 13 of 20 5.0/ 5.0 Points
Chlorine boils at 239 K. What is the boiling point of chlorine expressed in degrees Celsius?
A. 93°C
B. 34°C
C. –61°C
D. –34°C


Question 14 of 20 5.0/ 5.0 Points
Which of the following is the correct scientific notation for 0.00000862?
A.
8.62 x 10-6

B.
8.62 x 106

C.
8.62 x 10-7

D.
8.62 x 107



Question 15 of 20 5.0/ 5.0 Points
According to the rules of significant figures, the number of digits that are estimated in a measurement is:
A. one.
B. two.
C. three.
D. none.


Question 16 of 20 0.0/ 5.0 Points
Any zero in a measurement is always significant.
True
False


Question 17 of 20 5.0/ 5.0 Points
Which of these equalities is correct?
A. 1 mm = 10 cm
B. 1 L = 1000 mL
C. 1 cm = 100 m
D. 1 g = 1000 kg


Question 18 of 20 5.0/ 5.0 Points
Which of these chemicals is definitely inorganic?
A. one that is made of carbon and oxygen
B. one that is made of nitrogen and hydrogen
C. one that is made of nitrogen and carbon
D. one that is made of carbon and hydrogen


Question 19 of 20 5.0/ 5.0 Points
The number of seconds in a 40-hour work week can be calculated as follows:
A.


B.


C.


D.




Question 20 of 20 5.0/ 5.0 Points
The metric prefix milli- means:
A. 100 times smaller.
B. 1000 times larger.
C. 1000 times smaller.
D. 100 times larger.








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Copyright 2003-2017 The Apereo Foundation. All rights reserved. Portions of Sakai are copyrighted by other parties as described in the Acknowledgments screen.
Build Info:
Server Time: