Test #2 Example

 

PART I - Multiply Choice

 

Directions:  Using Scantron 882-E, mark the correct response with a #2 pencil.  Erase all corrections completely.  Good luck!

 

  1. Which of the following is a scientific observation?
    1. Freezing and boiling are called physical changes.
    2. If a substance freezes at 0°C, it must be water.
    3. When a substance freezes, its molecules lose potential energy.
    4. Water freezes at 0°C.
    5. None of the above

 

  1. All of the following units can be used for density except
    1. g/cm3
    2. kg/m3
    3. g/L
    4. kg/m2
    5. ng/nm3

 

  1. The number 0.00480 has how many significant digits?
    1. 2         
    2. 3
    3. 4
    4. 5
    5. 6

 

  1. Changing hydrogen and oxygen into water is a
    1. physical change
    2. chemical change
    3. conservation reaction
    4. decomposition occurrence
    5. none of the above

 

  1. Coffee is an example of
    1. an element
    2. a compound
    3. a homogeneous mixture
    4. a heterogeneous mixture
    5. a homogeneous and heterogeneous mixture

 

  1. The number of protons in zinc-65 is
    1. 65
    2. 30
    3. 35
    4. 95
    5. 109

   

  1. Which of the following atomic symbol is incorrect?

      a.  138 Ba          

           

      b.  48 Ti

            22

      c.  Iron - 56

         

      d.  14 Li

              7

      e.   Nitrogen -14                   

 

 

PART II - Free Response

 

 Table I.  Significant Figures

Directions:  Complete the following equation.  Remember to record the units. 

Problem

Show work in space provided in this section.

Answer in Scientific Notation

 

(4.5600 x 103 – 2.91 x 101)

5.1

 

 

 

 

 

 

 

 

 

At 25oC, air has a density of 1.3 x 10-3 g/mL.  What is this density in nanograms per cubic micrometers?

 

 

 

 

 

 

 

 

A block of metal measuring 300.0 dm x 40 km x 590 dm has a mass of 47000 cg.  What is the density of the metal in grams per mL?

 

 

 

 

Table II.  Isotopes:  Complete the following table.  Write clearly or your answer is void.

Complete Isotopic Symbol

Mass Number

Atomic Number

# of neutrons

# of electrons

Metal, metalloid or nonmetal

Period

Group
Number

 

 

 

16

8

 

10

 

 

 

         56

        Fe 3+

         26

 

 

 

 

 

 

 

 

 

 

75

33

 

33

 

 

 

 

 

 

 

47

60

46

 

 

 

 

 

Table III.  Nomenclature:  Complete the following table using IUPAC nomenclature only. 

Name

Symbol

Describe compound as:  covalent, ionic, acid or hydrate

Mercury(I) thiosulfate

 

 

 

Gold(III) acetate

 

 

 

 

 In(ClO4)3

 

 

Nitric Acid

 

 

 

 

 

Cd(NO3)2

 

 Ammonium dichromate

 

 

 

 Hydrogen

 

 

 

 

 LiClO3

 

 

Barium sulfite dihydrate

 

 

Phosphoric acid

 

 

 

Barium chlorate

 

 

 

Cupric phosphide

 

 

 

 

 

Cs2O

 

 

 

SnCl2 . 6 H2O

 

Stannic permanganate

 

 

 

Bromine

 

 

 

 

NH3

 

 

Mercury(I) selenide

 

 

 

 

 Back to Homepage