Pre-requisite Evaluation Quiz

1. Perform the following conversions.

68 ng to g

1.36x10^-4 cm to pm

251 ^oF to K

2. The density of gasoline is 0.894 g/mL. What mass of gasoline, in pounds, occupies 1.34 L ?

    (1 pound = 454 g). Use dimensional analysis to solve.

3. Identify the following as either homogeneous (HM) or heterogeneous (HT).

_____calcium carbonate                      

_____scrambled eggs  

4. Identify the following as either physical (P) or chemical (C) properties.

_____ gold does not react with concentrated hydrochloric acid

_____ diluting copper sulfate solutions make them lighter in color.

5. Fill in the chart of the following isotopes.

symbol             mass#                  #p                   #n                     #e

¹³¹I

⁵³                      ____                ____                ____                ____

_____              ____                ____                20                    17

6. Given the following elements, select only those that fit the following categories.

Si  S  Cr  Ce  K  Kr  Br  Cu  Ca  Th

transition metals            _______________

metalloids                     _______________

lanthanides                    _______________

alkalai metals    _______________

halogens                       _______________

non-metals                    _______________

7. Technetium has been analyzed by mass spectrometry to be comprised of 3 isotopes. From the data below calculate the average atomic mass of technetium. SHOW ALL WORK.

isotope                         relative mass                 % abundance

technetium-97               96.9832 amu                2.13 %

technetium-98               97.9598 amu                86.32 %

technetium-99               98.9384 amu                11.55 %

8. Write the complete electron configurations for the following

Cl_________________________________________________

As_________________________________________________

9. Draw an energy level diagram for phosphorous.

10. Iron ore is 36.0% FeO by mass.

How many grams of FeO are contained in 875 g of ore?

How many grams of Fe are contained in the 875g of ore?

11. Arrange the following atoms in terms of increasing size.

                        C    O    S    Al

_______<_______<_______<_______

smallest                                                largest

 12. Rank the following bonds in terms of increasing polarity.

                                                N-H       C-F        O-I

_______<_______<________

  least                                 most

13. Provide a proper Lewis structure for C₂H₄O. Show all bonds with lines and all non-bonding pairs. Provide a second Lewis structure for C₂H₄O.

14. Name or write formulas for the following.

S₂O₅ ______________________________________________________

chromic acid ______________________________________________________

Cu₂SO₄ ______________________________________________________

silver oxalate ______________________________________________________

Ir(PO₄)₂ ______________________________________________________