Given the following information:
Br2bond energy = 193 kJ/mol
F2bond energy = 154 kJ/mol
Br2(g) + F2(g) –> BrF3(g)DH° = €384 kJ/mol
calculate the Br-F bond energy.
A)244 kJ/mol
B)237 kJ/mol
C)712 kJ/mol
D)128 kJ/mol
E)none of these
Describe the relationship between hexane and 2-methylpentane
A) optical isomers
B) structural isomers
C) geometric isomers
D) not isomers but different compounds
E) same compound
The CO molecule has the bond order:
A)0
B)1
C)2
D)3
E)4
Which of the following are oxidation-reduction reactions?
I.PCl3+ Cl2–> PCl5
II.Cu + 2AgNO3–> Cu(NO3)2+ 2Ag
III.CO2+ 2LiOH –> Li2CO3+ H2O
IV.FeCl2+ 2NaOH –> Fe(OH)2+ 2NaCl
A)III
B)IV
C)I and II
D)I, II, and III
E)I, II, III, and IV
For the reaction , the following data were collected:
The order of this reaction in N2O5is
A)0
B)1
C)2
D)3
E)none of these
Which of the following ions forms the fewest insoluble salts?
A)Al3+
B)Cl–
C)NH4
+
D)OH–
E)Mg2+
Consider the reaction
2N2O5(g) 4NO2(g) + O2(g)
at 25°C for which the following data are relevant:
Calculate H° for the reaction.
A) 110.022 kJ
B) 10.572 kJ
C) 121.311 kJ
D) 21.861 kJ
E) 155.178 kJ
Which of the following has the highest bond dissociation energy?
A)N2
B)N2
–
C)N2
2-
D)N2
+
E)N2
2+
Select the spectator ions for the following reaction, Pb(NO3)2+ 2 KCl –> PbCl2+ 2
NaNO3
A)K+(aq), NO3
–(aq)
B)Pb2+(aq), NO3
–(aq)
C)K+(aq), Cl–(aq)
D)Pb2+(aq), Cl –(aq), K+(aq), NO3
–(aq)
E)Pb2+(aq), Cl –(aq)
Select the answer that best describes an aqueous solution made from each of the
following substances:
solid ammonium acetate (NH4C2H3O2). For NH4
+, Ka=5.6×10-10; for C2H3O2
–,
Kb=5.6×10-10.
A) acidic
B) basic
C) neutral
D) cannot tell
E) none of these (A-D)
What is the order of this reaction?
A)4
B)3
C)2
D)1
E)0
Complete the following table.
Which of the following frequencies corresponds to light with the longest wavelength?
Larger first ionization energy, Be or B
He(g) at 3 atm –> He(g) at 1 atm
What partial pressure of nitrogen gas is required in order for 0.00134g of the gas to
dissolve in 13.1mL of pure water? The Henry’s law constant for nitrogen gas is 6.1
´10-4M atm-1.
The solubility of O2in water is 0.590 g/L at an oxygen pressure of around 14.5atm.
What is the Henry’s law constant for O2(in units of mol/L·atm)?
Larger atomic radius, Fe2+or Fe3+