Which has these types of electromagnetic radiation arranged in order of decreasing
energy?
A)visible, ultraviolet, x-ray
B)radiowaves, visible, ultraviolet
C)ultraviolet, visible, infrared
D)x-ray, visible, ultraviolet
E)none of these
The following data were obtained for the reaction of NO with O2. Concentrations are in
molecules/cm3and rates are in molecules/cm3‘s.
What is the rate law?
A)Rate = k[NO][O2]
B)Rate = k[NO][O2]2
C)Rate = k[NO]2[O2]
D)Rate = k[NO]2
E)Rate = k[NO]2[O2]2
A solution is made by dissolving 27.8 g of nicotine (molar mass = 160 g/mol) in 145 g
of cyclohexane (C6H12) to form 142 mL of solution. Calculate the mole fraction of the
solute and the molarity, respectively, of this solution.
A)0.174, 1.22 M
B)0.101, 12.1 M
C)0.101, 1.22 M
D)0.091, 1.22 M
E) 0.174, 12.1 M
Balance the following redox equation in acidic solution. What is the coefficient of the
water? MnO4
–(aq) + H2O2(aq) –> Mn2+(aq) + O2(g)
A) 2
B) 4
C) 6
D) 8
E) 16
How many of the following salts are expected to be insoluble in water?
sodium sulfide barium nitrate
ammonium sulfatepotassium phosphate
A)none
B)1
C)2
D)3
E)4
Calculate the change in energy in kJ/mol for the transmutation of radium from the given
molar masses:
A) -5.2 kJ/mol
B) -1.6 kJ/mol
C) -4.7 x 1014kJ/mol
D) -4.7 x 108kJ/mol
E) +1.6 x 108kJ/mol
Which of the following statements is not true?
A)When a metal reacts with a nonmetal, an ionic compound is formed.
B)A metal-nonmetal reaction can always be assumed to be an oxidation-reduction
reaction.
C)Two nonmetals can undergo an oxidation-reduction reaction.
D)When two nonmetals react, the compound formed is ionic.
E)A metal-nonmetal reaction involves electron transfer.
What is the bond order of He2
+?
A)0
B)
C)1
D)
E)2
Consider the following system at equilibrium: N2(g) + 3H2(g) 2NH3(g) + 92.94 kJ
Which of the following changes will shift the equilibrium to the right?
A) I, IV, VI, VII
B) II, III, V, VIII
C) I, VI, VIII
D) I, III, V, VII
E) II, IV, V, VIII
Describe the pH of the following salts? NaF, NH4Cl, KI, NH4F
A) acidic, basic, neutral, cannot tell without further information
B) neutral, acidic, neutral, cannot tell without further information
C) neutral, acidic, neutral, neutral
D) basic, acidic, neutral, cannot tell without further information
E) basic, acidic, neutral, neutral
Consider the following hypothetical reaction at 310 K. Standard free energies of
formation are given in parentheses.
Calculate the standard free energy of formation of compound B.
A) 209.0 kJ/mol
B) -209.0 kJ/mol
C) 143.8 kJ/mol
D) -143.8 kJ/mol
E) none of these
How many of the following apply to globular proteins?
A) 1
B) 2
C) 3
D) 4
E) 5
The unit cell in this two–dimensional crystal contains __________ Xs and __________
Os.
XXXX
OOOO
XXXX
OOOO
XXXX
OOOO
A)1,1
B)2,1
C)1,2
D)4,1
E)1,4
Consider the following processes:
2A –> (1/2)B + CDH1= 5 kJ/mol
(3/2)B + 4C –> 2A + C + 3DDH2= -15 kJ/mol
E + 4A ® CDH3= 10 kJ/mol
Calculate DH for: C –> E + 3D
A)0 kJ/mol
B)10 kJ/mol
C)-10 kJ/mol
D)-20 kJ/mol
E)20 kJ/mol
Which of the following ions is NOT likely to form from the appropriate atom?
A)C4+
B)As3-
C)Mg2+
D)Ti4+
E)Na+
Here are some crystal field representations of d electrons in an octahedral complex:
Choose the representation that fits the transition metal atom in the following species:
K4Mn(CN)6(assume strong field)
A) representation I
B) representation II
C) representation III
D) representation IV
E) representation V
Use the following table to assist in answering the question below.
The rate constant for the decay of unstable nuclide X by alpha-particle emission is
4.21×10-13/ day. What is the identity of X?
A) Radium-226
B) Thorium-230
C) Uranium-234
D) Uranium-238
E) Lead-210
For the redox reaction 2Fe2++ Cl2–> 2Fe3++ 2Cl–which of the following are the correct
half-reactions?
A) I and IV
B) I and V
C) II and IV
D) II and V
E) III and IV
Select the correct molecular structure for the given species from the choices below:
NI3
A)pyramidal
B)tetrahedral
C)square planar
D)octahedral
E)none of these
For the gaseous reaction, 2 H2+ 2 NO <=> 2 H2O + N2, Kpat 120oC = 2.42. At a given
moment, it is found that the partial pressures of H2, NO, H2O and N2are 1.1, 1.3, 0.78
and 2.2 atm, respectively. Which of the following statements describes the situation?
A) Qp= 1.2 so the reaction goes to the right
B) Qp= 1.2 so the reaction goes to the left
C) Qp= 0.65 so the reaction goes to the right
D) Qp= 0.65 so the reaction goes to the left
E) The reaction is at equilibrium