Arkansas State University Department of Chemistry and Physics

1. Give the number of significant figures in each of the  following. 

 a)  10.0005 g     6

 b)  0.003423 mm    4

 c)  2900 + 100 ft     2

 d)  8.9 x 10⁵ L     2

 e)  the number of minutes (60) that make up an hour        infinite

2. Determine the answer for each of the following.  Be sure to  use the correct number of significant figures.
 

a)  47.36                                       b)    -1.960

c)  5.6 x 10²                                  d)   5 x 10³

3. Round each of the following to 3 significant figures.

 708                                2.30 x 10³
 

 0.000335                      10.3
 

 19.0 x 10²¹

4. Convert each of the following into correct scientific  notation.

 1.747  x 10³

 9.84  x 10^-6

 3.2000 x 10⁵

 2.014 x 10^-1

 2.560 x 10¹⁶

5. Calculate the following using the correct number of significant figures.

 a)  3.26 x 10⁴⁷                   b)  7.5 x 10³

6. Calculate the following using the correct number of significant figures.

 a)  5.4 x 10¹¹⁸

 b)  9.5 x 10¹⁰