1) The mole fraction of urea (MW = 60.0 g/mol) in a solution prepared by dissolving 16
g of urea in 39 g of H2O is ________.
A) 0.58
B) 0.37
C) 0.13
D) 0.11
E) 9.1
2) Which of the following is a polydentate ligand?
A) ammonia
B) oxalate ion
C) chloride ion
D) water
E) hydroxide ion
3) Of the molecules below, only ________ is polar.
A) CO2
B) CH4
C) PF5
D) SnF3
E) H2
4) The average rate of disappearance of I– in the initial 400.0 s is ________ M/s.
A) 6.00
B) 3.8 x 10-5
C) 1.4 x 10-4
D) 2.7 x 104
E) 3.2 x 10-4
5) The acidity of carbonated water is due to the ________.
A) presence of sulfur
B) reaction of CO2 and H2O
C) addition of acid
D) nonmetal oxides
E) none of the above
6) On the phase diagram shown above, segment ________ corresponds to the
conditions of temperature and pressure under which the solid and the gas of the
substance are in equilibrium.
A) AB
B) AC
C) AD
D) CD
E) BC
7) Which of the following can form both high- and low-spin octahedral complexes?
A) Ru2+
B) Cr3+
C) Cr4+
D) Zr
E) Ag+
8) A sample of He gas (2.35 mol) occupies 57.9 L at 300.0 K and 1.00 atm. The volume
of this sample is ________ L at 469 K and 1.00 atm.
A) 0.709
B) 41.1
C) 90.5
D) 1.41
E) 57.9
9) Sodium does not occur in nature as Na (s) because ________.
A) it is easily reduced to Na–
B) it is easily oxidized to Na+
C) it reacts with water with great difficulty
D) it is easily replaced by silver in its ores
E) it undergoes a disproportionation reaction to Na– and Na+
10) In which species does nitrogen have the highest oxidation number?
A) NaNO3
B) HNO2
C) NO2
–
D) NH3
E) N2
11) Of the choices below, which gives the order for first ionization energies?
A) Cl > S > Al > Ar > Si
B) Ar > Cl > S > Si > Al
C) Al > Si > S > Cl > Ar
D) Cl > S > Al > Si > Ar
E) S > Si > Cl > Al > Ar
12) 1 mole of which of the following will contain the largest number of atoms?
A) sodium
B) magnesium
C) mercury
D) neon
E) 1 mole of any element will contain the same number of atoms.
13) A compound that is composed of carbon, hydrogen, and oxygen contains 70.6% C,
5.9% H, and 23.5% O by mass. The molecular weight of the compound is 136 amu.
What is the molecular formula?
A) C8H8O2
B) C8H4O
C) C4H4O
D) C9H12O
E) C5H6O2
14) Sodium borohydride, NaBH4, is a strong reducing agent because ________.
A) Na+ is easily reduced to Na (s)
B) boron easily changes its oxidation number from +3 to -3
C) boron is readily oxidized from -3 oxidation state to +3
D) hydrogen can be easily oxidized from -1 oxidation state to +1
E) hydrogen is easily reduced from +1 oxidation state to 0
15) What is a siderophore?
16) Two compounds have the same formula and contain an SCN– ligand. In one
compound the SCN– ligand is bonded to the metal atom via the N atom and in the other
it is bonded via the S atom. These two compounds are examples of ________ isomers.
17) In the reaction of nitric acid with benzene, which isomer is formed when a second
nitro group is substituted?
18) From the information given below, calculate the heat of combustion of methane.
Start by writing the balanced equation.
19) The uptake of molecules into the interior of another substance is referred to as
________.
20) Physical properties of a solution that depend on the quantity of the solute particles
present, but not the kind or identity of the particles, are termed ________ properties.
21) The first law of thermodynamics can be given as ________.
22) Suppose you have just added 100.0 ml of a solution containing 0.5000 moles of
acetic acid per liter to 400.0 ml of 0.5000 M NaOH. What is the final pH? The Ka of
acetic acid is 1.77 x 10-5.