1.What is the mass of a liquid that occupies 37 cm 3 and has a density of 6.7 g/cm 3 ?

2.The density of a liquid is 4.7 g/cm 3 . Convert the density to kg/m 3 by use of unit conversion factors.

3. 9.1 x 10 -28 g = _____ kg

4. 1.5 x 10 -10 m = _____ cm

5. Work #1 all the following ways:

a) by unit conversion factors

b) by using a proportion

c) by starting with the equation for the definition of density, rearranging it so that what you want to know is on the LHS and what you know is on the RHS, then substituting in and solving.

6. 39 cm3 = _______ m3

7. Underline the significant figures in the number 0.0000450.

8. How will you know which number to put in numberator and which in denominator in converstion factor or unit label problems?

9. How will you know how to decode a metric prefix into a unit converstion factor.  For example - if you know the that giga is a prefix for a big number is the converstion factor  1 giga hertz = 109 Hz  or 1 giga hertz = 10-9 Hz  or 1 hertz = 109  giga Hz or 1 hertz = 10-9  giga Hz

Chapter 2

10.  Multiple proportions.

Suppose the following data is collected on four compounds composed of (imaginary) elements A, B, and C.
 
 
compound %A %B %C  Formula
I 9.1 90.9 0
II 16.7 83.1 0
III 33.3 0 66.7
IV 7.6 76.7 15.4

 

Assuming the atomic weight of A is 10; what might be the atomic weights of B and C and based on these weights what would be  the formulas of compounds I thru IV.  (There are many possible correct answers to this question.)