CH 104: Lesson 1a

Self Quiz Answers

1.    0.0057 has how many significant digits?

a. 1
*b. 2
c. 3
d. 4
e. 5

2.    The answer to  5.300 x 3.10 has how many significant digits?

a. 1
b. 2
*c. 3
d. 4
e. 5

3.     5.300 =
         3.10

a. 1.7097
b. 1.710
*c. 1.71
d. 1.7
e. 2

4.    "Milli-" means:

a. 1000
b. 100
c. 1/10
d. 1/100
*e. 1/1000

5.    "Centi-" means:

a. 1000
b. 100
c. 1/10
*d. 1/100
e. 1/1000

6.    Change 0.092 to proper scientific notation.

        9.2 x 10^-2

7.    25 cm =

a. 0.025 m
*b. 0.25 m
c. 2.5 m
d. 250 m
e. 2500 m

8.       3.0 x 10⁶  =
         4.0 x 10^-2

a. 7.5 x 10^-9
b. 7.5 x 10^-7
c. 7.5 x 10³
*d. 7.5 x 10⁷
e. 7.5 x 10⁹

9.       3.0 x 10⁶  =
          4.0 x 10²

a. 7.5 x 10^-9
b. 7.5 x 10^-7
*c. 7.5 x 10³
d. 7.5 x 10⁷
e. 7.5 x 10⁹

10.   Chemists measure volume using this unit:

a. meter
b. centimeter
*c. milliliter
d. gram
e. ounce

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