CHM 1045 September 15, 1998 Test #1A Name ________________________

 

  1. Which of the following is not one of the seven SI base units?

    2. a. time b. mass c. temperature d. length e. density

     

  2. 1 ng = ___ g

    3. a. 10 b. 103 c. 109 d. 10-3 e. 10-9

     

  3. How many significant figures are in 0.07041?

    4. a. 1 b. 2 c. 3 d. 4 e. can’t tell

     

  4. How many significant figures are in 0.010?

    5. a. 1 b. 2 c. 3 d. 4 e. 5

     

  5. How many significant figures are in 7.7 x 106?

    6. a. 2 b. 3 c. 4 d. 6 e. 8

     

  6. Round off the following to the proper number of significant figures.

    7. 7.1274 x 0.06500 = 0.4632810

    a. 0.46 b. 0.463 c. 0.4633 d. 0.46328 e. 0.463281

     

  7. Convert 7990 mL to quarts. (1 qt = 0.946 L)

    8. a. 0.138 qt b. 124 qt c. 1.24 x 105 qt d. 8.45 qt

     

  8. Convert 35.3 m to ft. ( 1 in = 2.54 cm)

    9. a. 479 ft b. 669 ft c. 267 ft d. 106 ft e. 116 ft

     

  9. Convert 93.2 m/s to mi/hr. ( 1 mi = 1610 m)

    10. a. 190 mi/hr b. 208 mi/hr c. 60.4 mi/hr d. 4.42 x 104 mi/hr e. 288 mi/hr

     

     

  10. Convert 255 cm3 to in3. ( 1 in = 2.54 cm)

    11. a. 15.6 in3 b. 10.6 in3 c. 39.5 in3 d. 4180 in3 e. 100 in3

     

  11. A certain brand of gasoline has a density of 0.67 g/mL. If you have 12 gallons of this gasoline in your car’s gas tank, how many pounds of this gasoline are in the tank?.

    12. ( 1 lb = 454 g, 1 L = 1.0567 quarts, 1 gallon = 4 quarts)

    a. 67 lb b 24 lb c. 170 lb d. 3.0 lb e. 430 lb

     

     

  12. A chemist needs 125 g of a liquid that has a density of 1.08 g/mL. How many mL should she measure out?

    13. a. 21.0 mL b. 116 mL c. 135 mL d. 125 mL e. 99 mL

     

  13. Iron is transformed into rust in the presence of air and water. What kind of property does this describe?

    14. a. chemical b. physical c. extensive

     

  14. Which of these is a compound? 

    15. a. milk b. uranium c. salt water d. wine e. carbon dioxide

     

  15. Which of these has the smallest mass?

    16. a. a proton b. a neutron c. an electron d. a carbon atom

     

  16. When did John Dalton publish the atomic theory?
    1. in the fifth century BC
    2. before Columbus made his voyage to the new world
    3. after Columbus but before the American revolution
    4. after the American revolution but before the civil war
    5. after the civil war

 

  1.   How many neutrons does 4119K contain? 

    2. a. 19 b. 22 c. 41 d. 60 e. 20

     

  2. Which of these elements normally exists as a diatomic molecule?

    3. a. Na b. Ne c. S d. P e. N

     

  3. Which of these compounds is ionic?

    4. a. HCl b. MgSO4 c. SO2 d. CH4 e. NO

     

  4. Which of these compounds is molecular?

    5. a. Na2O b. NH4Cl c. NaCl d. MgSO4 e. P2O5

     

  5. How many electrons does the O2- ion contain? 

a. 6 b. 7 c. 8 d. 9 e. 10

 
  1. How is NH4NO3 named?

    2. a. ammonium nitrate b. ammonium nitrogen oxide c. ammonia nitride

    d. nitrogen hydrogen oxide e. nitric acid

     

  2. Name BaF2.

    3.  a. barium fluorine b. barium(II) fluoride c. barium difluoride

    d. barium fluoride e. barium difluorine

     

  3. What is the formula for calcium sulfate?

    4. a. CaS b. Ca2S c. CaSO3 d. Ca2SO4 e. CaSO4

     

  4. What is the formula for calcium sulfite?

    5. a. CaS b. Ca2S c. CaSO3 d. Ca2SO4 e. CaSO4

     

  5. What is the formula for iron(III) oxide? 

    6. a. FeO b. FeO2 c. Fe2O d. Fe2O3 e. FeO3

     

  6. What is the formula for potassium hydroxide?

    7. a. KOH b. K2O c. KO2 d. K(OH)2 e. K2OH

     

  7. Name OF2.

    8. a. oxygen fluoride b. oxygen difluoride c. oxygen(II) fluoride

    d. oxygen fluorite e. fluorine oxide

     

  8. Which of the following is an element?

    9. a. table salt b. water c. ethanol d. methanol e. oxygen

     

  9. Which of the following is a mixture?

    10. a. table salt b. silica c. beer d. carbon dioxide e. methanol

     

  10. Which of the following can be separated into two or more substances by physical means alone?

    11. a. acetone b. hydrogen sulfide c. carbon monoxide d. carbon disulfide e. gasoline

     

  11. A substance that yields hydrogen ions (H+) when dissolved in water is called

    12. a. an acid b. a base c. a salt

     

  12. 6.778 – 6. 728 =

    13. a. 0.05 b. 0.050 c. 0.0500 d. 0.05000

     

  13. (34.555 – 34.005)/1.0661 =
    1. 0.5 b. 0.52 c. 0.516 d. 0.5159 e. 0.51590

 

  1.  Ernest Rutherford

a. discovered the electron

b. discovered radioactivity

c. proposed the "plum pudding" model of the atom
  1. proposed the nuclear model of the atom
  2. measured the mass of the electron

 

  1. The following procedure was carried out to determine the volume of a flask. The flask was weighed dry and then filled with water. If the masses of the empty flask and filled flask were 105.07 g and 150.61 g, respectively, and the density of water is 0.9976 g/cm3, calculate the volume of the flask in cubic centimeters. 

    2. a. 45.65 b. 45.54 c. 45.43 d. 150.97 e. 1.002

     

  2. The elements in the first column of the periodic table are often called the

    3. a. halogens b. alkali metals c. alkaline earth metals d. transition elements

     

  3. For the measured quantity 6.0 mL you should assume that the actual volume is somewhere between 

    4. a. 5 and 7 mL b. 5.9 and 6.1 mL c. 5.99 and 6.01 mL d. exactly 6 mL

     

  4. ______ refers to how closely two or more measurements of the same quantity agree with one another.

a. uncertainty b. error c. accuracy d. precision

 

  40. A student measured the density of ethanol to be 0.791 g/mL. The actual density is 0.798 g/mL.

    The percent error should be reported to be

  1. 0.007% b. 0.877% c. 0.88% d. 0.9%

 

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