1.   Give the number of significant digits in each of the following:

        a.   2050

        b.   0.4909

        c.   15.8   

        d.   0.0000763

        e.   1.00 x 10⁴

 

2.   Express each number in proper scientific notation:

 

a.   0.362

b.   1.937

c.   10570

d.   0.002910

 

3.   Perform the following conversions--use 3 significant digits:  (NOTE:  See your text for some conversion relationships.)

         a.   15.0 mm  = ________ cm

b.   0.0792 km  = ________ m

c.   0.137 g    = ________ mg

d.   7.80 mL   = ________ L

e.   0.0462 L  = ________ mL

 

4.   Express the answers to these to the proper number of significant digits:

 

a.   (14) (5.39) =

 

          b.   .000685   =

        0.7210

 

          c.   (17.0) (3.55)  =

      3

 

          d.        5.00

 + .0189

 

          e.        .08070

- .0041