Chemistry

1) A factor of 1.0 x 10-6 corresponds to the prefix:

1. a)  pico
   
2. b)  femto
   
3. c)  micro
   
4. d)  nano
   

2) Express 0.082051 in scientific notation:

1. a)  8.2051 x 10-3
   
2. b)  8.2051 x 10-1
   
3. c)  8.2051 x 102
   
4. d)  8.2051 x 10-2
   

3) A temperature of 65 F is equal to:

1. a)  18  C
   
2. b)  19  C
   
3. c)  54  C
   
4. d)  65  C
   

4) What name would you give to a compound consisting of three fluorine atoms and one aluminum atom?
a) aluminum fluorine
b) dibflourine aluminide
c) aluminum fluoride
d) aluminum (III) fluoride


5) Which of the following is the correct name for N2O3 :
a) dinitrogen trioxide
b) nitrogen (III) oxide 
c) nitrogen trioxide 
d) dinitrogen oxide


6) What is the correct formula for Cobalt (II) chloride? 
a) CoCl
b) Co2Cl
c) CoCl2
d) CCl


7) How many protons and electrons are present in the Fe2+ ion? 
a) 26p, 27e
b) 26p, 28e
c) 26p, 24e
d) 24p, 22e


8) Choose that pair of names and formulas that do not match:
 a) SnCl4 : tin(IV) chloride
b) Fe2(SO4)3 : iron(III) sulfate
c) SnO : tin(II) oxide
d) Cu2O : copper(II) oxide

1

9) An experiment calls for 22.6 g bromine (d = 3.12 g/cm3). What volume in mL should be used?
a. 70.5
b. 7.24 x 103 c. 7.24
d. 7.05 x103


10) Express the number 9067.7 in scientific notation to 4 significant figures.
 a. 9.067 × 103
b. 9.068 × 103
c. 906.7 × 101
d. 90.67 × 102


11) The measurement 3.2 × 10−3 g could also be written as: 
a. 3.2 kg
b. 3.2 mg
c. 3.2 g
d. None of these


12) Express the sum of 7.68 m and 5.0 m using the correct number of significant figures. 
a. 13 m
b. 12.68 m
c. 10 m
d. 12.7 m


13) What is the answer with the proper significant figures for the following equation? (2 × 1.2) + (367 ÷ 1.6) + (3.6 × 102) =
a. 591.775 b. 591.8
c. 592
d. 5.9 × 102


14) For the conversion of 0.073 gallons to milliliters, the conversion factors are 4 quarts per gallon, 1.057 quarts per liter, and 1×10−3 liter per milliliter. The correctly expressed answer is:
a. 3.09 × 102 mL
b. 3.62 × 10−2 mL 
c. 2.76 × 102 mL 
d. 2.8 × 102 mL


15) Which of the following would be expected to have chemical properties similar to those of sulfur?
a. F
b. Se
c. P d. Ar


16) What ion would you expect P to form? Would the P atom lose or gain electrons in this process?
a. P5− ; lose 5 electrons ;
 b. P3+ ; gain 3 electrons
c. P3+ ; lose 3 electrons ; 
d. P3− ; gain 3 electrons

17) What is the sum of the coefficients for the following reaction when is properly balanced:

a. 12Mg3N2 + H2O → Mg(OH)2 + NH3

b. 6
c. 11
d. none of the above


18) What is the compound CaCl2 called?
 a. calcium (II) chloride
b. calcium (I) chloride
c. calcium dichloride
d. calcium chloride

19) Name the binary molecular compound SCl2.
a. sulfur dichloride
b. silicon dichlorate 
c. selenium dichloride 
d. sulfur chlorate
20) Choose the formula for the compound nitrous acid.
 a. HN
 b. H2NO2
c. HNO4
d. HNO2

21) Pick the name and formula that do NOT match.
a. HBrO4 : perbromic acid
b. HCN : hydrocyanic acid
c. H2CrO4 : chromic acid
d. H2PO4 : phosphoric acid

22) Which elements would be classified as metals? 
a. Aluminum, Boron, and Carbon
b. Calcium and Iron
c. Sodium, Oxygen and Neon
d. none of the above


23) Which one of the following combination is wrong?
 a. iron(II) sulfide : FeS
b. sodium sulfate : Na2SO4
c. sodium nitrate : NaNO3
d. nitrogen chloride : NCl3


24) Some liquids flow more slowly than others because the particles
a. stick together more.
b. are arranged in an irregular pattern. 
C. are larger.
d. are irregularly shaped.


25) The number 8.3140 written in scientific notation becomes:
 a. 8.3140 × 101
 b. 8.314 × 10−1
c. 8.3140 × 100 
d. 83.14 × 10−2