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1) The density of a 167.4 g sample of magnesium having a volume of 96.32 mL is
________ g/cm3.
A) 0.5754
B) 7128
C) 3.625
D) 2.663
E) 1.738
2) Which solution will be the most basic?
A) 0.10 M Ba(OH)2
B) 0.10 M KOH
C) 0.10 M H2O
D) 0.10 M CH3OH
E) All solutions have equal basicity.
3) What are the respective concentrations (M) of Fe3+ and I- afforded by dissolving
0.200 mol FeI3 in water and diluting to 725 mL?
A) 0.276 and 0.828
B) 0.828 and 0.276
C) 0.276 and 0.276
D) 0.145 and 0.435
E) 0.145 and 0.0483
4) How many pairs of unpaired electrons are there in one molecule of carbon
monoxide?
A) 0
B) 1
C) 2
D) 3
E) 4
5) A solution is prepared by dissolving 23.7 g of CaCl2 in 375 g of water. The density of
the resulting solution is 1.05 g/mL. The concentration of Cl- in this solution is
________ M.
A) 0.214
B) 0.562
C) 1.12
D) 1.20
E) 6.64 x 10-2
6) The main ionic constituent of sea water is ________.
A) Na+
B) Cl-
C) SO4
2-
D) Mg2+
E) Ca2+
7) What type of compound has been used to replace tetraethyl lead ((C2H5)4Pb) as an
antiknock agent in gasoline?
A) aromatic compounds
B) olefins
C) fluorochlorocarbons
D) paraffins
E) oxygenated hydrocarbons
8) The most stable allotrope of oxygen is ________.
A) H2O
B) O3
C) O2
D) HClO
E) O
9) The layer of the atmosphere that contains our weather is called the ________.
A) mesosphere
B) heterosphere
C) stratosphere
D) thermosphere
E) troposphere
10) What is the enthalpy change (in kJ) of a chemical reaction that raises the
temperature of 250.0 mL of solution having a density of 1.25 g/mL by 3.33 °C? (The
specific heat of the solution is 3.74 J/g-K.)
A) -7.43 kJ
B) -12.51 kJ
C) 8.20 kJ
D) -3.89 kJ
E) 6.51 kJ
11) In molecular orbital theory, the bond order of the He-He bond in He2 is ________.
A) 0
B) 2
C) He-He
D) 1
E) 1/2
12) Pyrex® glass is formed by adding an oxide of ________ to soda-lime glass.
A) lead
B) cobalt
C) boron
D) silver
E) phosphorous
13) Of the metals below, only ________ will not dissolve in an aqueous solution
containing nickel ions.
aluminum
chromium
barium
tin
potassium
A) aluminum
B) chromium
C) barium
D) tin
E) potassium
14) "Isothermal" means ________.
A) at constant pressure
B) at constant temperature
C) at variable temperature and pressure conditions
D) at ideal temperature and pressure conditions
E) that ΔHrxn = 0
15) How many iron atoms are coordinated in a hemoglobin molecule?
A) 1
B) 2
C) 3
D) 4
E) 5
16) Calculate the percent ionization of nitrous acid in a solution that is 0.241 M in
nitrous acid (HNO2) and 0.195 M in potassium nitrite (KNO2). The acid dissociation
constant of nitrous acid is 4.50 x 10-4.
A) 44.7
B) 0.229
C) 13.5
D) 2.11 x 10-3
E) 3.258
17) 1 mole of which of the following will have the largest mass?
A) rubidium
B) magnesium
C) gold
D) neon
E) 1 mole of any element will contain the same mass.
