Arkansas State University Department of Chemistry and Physics

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

 a)  10.0005 g   ______

 b)  0.003423 mm  ______

 c)  2900 + 100 ft  ______

 d)  8.9 x 10⁵ L  ______

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

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

a)   27.34                                                         b)    2.8023
        6.90                                                             -  4.762
  +  13.124
 

c)  0.32 x 14.50 x 120 =                                   d)  24.1 / 0.005  =

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

 707.5  ____________                                 2,300.2  ______________
 

 0.0003350   _____________                      10.26730   _______________
 

 18.95 x 10²¹   ______________

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

 1747    _________________________________

 0.00000984     ___________________________

 3200.0 x 10²  ____________________________

 0.002014 x 10²  __________________________

 25600000000000000  ______________________  (use 4 sig. fig. for the last one only)

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

 a)  2.34 x 10⁴⁷                   b)  9132.0
   + 9.2 x 10⁴⁶                           -    1.6 x 10³

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

 a)  (1.54 x 10⁵⁸)(3.5 x 10⁶⁰)

 b)  (7.9 x 10³⁴) / (8.32 x 10²³)
 

answers

Scientific Notation/ Significant Figures Worksheet 1
Scientific Notation/ Significant Figures Worksheet 2