Which of the following could be the identity of a white crystalline solid that exhibits the following properties?
-It melts at 320 C
-It does not conduct electricity as a solid
- It conducts electricity in an aqueous solution
(A) C6H12O6 (s)
(B) NaOH (s)
(B) NaOH (s)
Which of the following correctly identifies which has the higher first ionization energy, Cl or AR, and supplies the best justification?
(A) Cl, because of its higher electronegativity
(B) Cl, because of its higher electron affinity
(C) Ar, becaues of its
(D) Ar, because of its higher effective nuclear charge
Which state or states of matter are significantly
compressible?
a. gases d. liquids and gases
b. liquids e. solids and liquids
c. solids
a. gases
If matter is uniform throughout and cannot be
separated into other substances by physical
means, it is
a. a compound d. a heterogeneous mixture
b. either an element or a
compound
e. an element
c. a homogenous mixture
a. a compound
21. Pentacarbonyliron (Fe(CO)5) reacts with
phosphorous trifluoride and hydrogen to
release carbon monoxide. The reaction of 5.0
mol of Fe(CO)5, 8.0 mol of PF3, and 6.0 mol of
H2 will release ________ mol of CO.
Fe(CO)5+2PF3+H2?Fe(CO)2(PF3)2H2+3CO
a. 15 d
e. 12
The functional group that represents an organic acid is written as
a. RCHO
b. ROH
c. RCOOH
d. RCl
c. RCOOH
Balance the following skelton reaction inacid solution using the ion electron method to obtain a reaction with the smallest possible whole-number coefficient. The sum of all of the coefficients in the balanced equation is: IO3 + Cl yields ClO + I2
a. 8
b.
c. 16
A 50.0 mL sample of 0.0025 M HBr is mixed with 50.0 mL of 0.0023 M KOH. Whaqt is the pH of the resulting mixture?
a. 1.00
b. 4.00
c. 5.00
d. 11.00
b. 4.00
Which pair of reactants will have no net ionic equation?
a. Na2SO3 + FeCl2
b. CaCl2 + MnBr2
c. Nh4I + Pb(NO3)2
d. KOH+ HClO4
CaCl2 + MnBr2
The rate law for the reaction of 2A + B yields 2P is
a. impossible without experimental data
b. [A]2[B]
c. k[A]2[B]
d. second order with respect to A
a. impossible without experimental data
The collision theory of reaction rates does not include
a. The number of collisions per second
b. The transition state
c. The energy of each collision
d. The orientation of each collision
d. The orientation of each collision
Carbon exists in various forms called allotropes. Which of the following is not an allotrope?
a. Diamond
b. Soot
c. Buckmintsterfullerene
d. Graphite
B. Soot
What is the molecular mass of a gas that has a density of 2.05 g/L at 26.0 C and 722 torr?
a. 53.0 g/mol
b. 46.7 g/mol
c. 4.67 g/mol
d. 2876 g/mol
A. 53.0
Para-dichlorobenzene is used as "mothballs". This compound can also be named
a. 1,2 dichlorobenzene
b. 1,3 dichlorobenzene
c. 2,4 dichlorobenzene
d. 1,4 dichlorobenzene
D. 1.4 dichlorobenzene
Under which conditions will a real gas most closely behave as an ideal gas?
a. High temperature and high pressure
b. High temperature and low pressure
c. High volume and high temperature
d. Low temperature and low pressure
B. High temp and low pressure
Which of the following geometries corresponds to a substance that has five sigma bonds and one nonbonding pair of electrons on the central atom?
a. Tetrahedron
b. Square Planar
c. Octahedron
d. Square pyramid
D. square pyramid
The relationship between the vapor pressure of a liquid and the heat of vaporization is expressed in the
a. Rydberg equation
b. Gibbs free energy equation
c. Clausius- Clapeyron equation
d. Arrhenius equation
C. Clausius-Clapeyron equation
What is the pH of a solution prepared by dissolving 0.1655 mole of hypochlorous acid in enough water to make 500 mL of solution? Ka is 3.0 x 10^-4
a. 1.00
b. 2.00
c. 5.4 x 10^-3
d. 1.76
B. 2.00B.
Substances whose Lewis structures must be drawn with an unpaired electron are called
a. ionic compounds
b. free radicals
c. resonance structires
d. polar molecules
b. free radicals
An ideal solution is a
a. mixture where two solvents cannot be dissolved in all ratios
b. mixture that has the same physical properties as the individual solvents
c. Mixture where the potential energy of the mixture is the same as that of the individual s
C.
Of the following pair of elements, which pair has the second element with the larger electronegativity based on its position in the periodic table?
a. oxygen, chromium
b. chlorine, iodine
c. calcium, cesium
d. sulfur, nitrogen
D. sulfur, nitrogen
Which of the following molecules is a strong electrolyte when dissolved in water?
a. Ch3COOH
b. HC2H3O2
c. PCl5
d. HBr
D. HBr
Which of the following is considered a metalloid?
a. Cr
b. Mn
c. Si
d. S
c. Si
Approximately how many half lives will it take to reduce 10.0 kg of a radioactive substance to 1.0 microgram substance?
a. 8
b. 13
c. 29
d. 34
D. 34
What is the conjugate acid of the H2PO4 ion?
a. HPO4
b. H2PO4
c. H3PO4
d. PO4
C. H3PO4
A first order reaction has a half life of 34 minutes. What is the rate constant for this reaction?
a. 3.4 x 10^-4
b. 2.04 x 10^-2
c. 2.9 x 10^-1
d. 34 mins
A. 3.4 x 10^-4
The rate law may be written using stoichiometric coefficients for which of the following?
a. Precipitation reactions
b. Acid - base reactions
c. Elementary processes
d. Solubility reactions
c. Elementary process
A certain radioactive material has a half life of 36 minutes. Starting with 10.0 grams of this material, how many grams will be left after 2 hours?
a. 1.00 grams
b. 1.5 x 10^-4 grams
c. 3.33 grams
d. 0.25 grams
A. 1.00 grams
Which is the strongest acid?
a. HBrO
b. HClO
c. HIO
d. HCLO3
D. HCLO3
All of these have the same electron configuration except?
a. Rb
b. Se
c. As
d. Sr
c. As
Which of the following could be the identity of a white crystalline solid that exhibits the following properties?
-It melts at 320 C
-It does not conduct electricity as a solid
- It conducts electricity in an aqueous solution
(A) C6H12O6 (s)
(B) NaOH (s)
(B) NaOH (s)
Which of the following correctly identifies which has the higher first ionization energy, Cl or AR, and supplies the best justification?
(A) Cl, because of its higher electronegativity
(B) Cl, because of its higher electron affinity
(C) Ar, becaues of its
(D) Ar, because of its higher effective nuclear charge
Which state or states of matter are significantly
compressible?
a. gases d. liquids and gases
b. liquids e. solids and liquids
c. solids
a. gases
If matter is uniform throughout and cannot be
separated into other substances by physical
means, it is
a. a compound d. a heterogeneous mixture
b. either an element or a
compound
e. an element
c. a homogenous mixture
a. a compound
21. Pentacarbonyliron (Fe(CO)5) reacts with
phosphorous trifluoride and hydrogen to
release carbon monoxide. The reaction of 5.0
mol of Fe(CO)5, 8.0 mol of PF3, and 6.0 mol of
H2 will release ________ mol of CO.
Fe(CO)5+2PF3+H2?Fe(CO)2(PF3)2H2+3CO
a. 15 d
e. 12
The functional group that represents an organic acid is written as
a. RCHO
b. ROH
c. RCOOH
d. RCl
c. RCOOH
Balance the following skelton reaction inacid solution using the ion electron method to obtain a reaction with the smallest possible whole-number coefficient. The sum of all of the coefficients in the balanced equation is: IO3 + Cl yields ClO + I2
a. 8
b.
c. 16
A 50.0 mL sample of 0.0025 M HBr is mixed with 50.0 mL of 0.0023 M KOH. Whaqt is the pH of the resulting mixture?
a. 1.00
b. 4.00
c. 5.00
d. 11.00
b. 4.00
Which pair of reactants will have no net ionic equation?
a. Na2SO3 + FeCl2
b. CaCl2 + MnBr2
c. Nh4I + Pb(NO3)2
d. KOH+ HClO4
CaCl2 + MnBr2
The rate law for the reaction of 2A + B yields 2P is
a. impossible without experimental data
b. [A]2[B]
c. k[A]2[B]
d. second order with respect to A
a. impossible without experimental data
The collision theory of reaction rates does not include
a. The number of collisions per second
b. The transition state
c. The energy of each collision
d. The orientation of each collision
d. The orientation of each collision
Carbon exists in various forms called allotropes. Which of the following is not an allotrope?
a. Diamond
b. Soot
c. Buckmintsterfullerene
d. Graphite
B. Soot
What is the molecular mass of a gas that has a density of 2.05 g/L at 26.0 C and 722 torr?
a. 53.0 g/mol
b. 46.7 g/mol
c. 4.67 g/mol
d. 2876 g/mol
A. 53.0
Para-dichlorobenzene is used as "mothballs". This compound can also be named
a. 1,2 dichlorobenzene
b. 1,3 dichlorobenzene
c. 2,4 dichlorobenzene
d. 1,4 dichlorobenzene
D. 1.4 dichlorobenzene
Under which conditions will a real gas most closely behave as an ideal gas?
a. High temperature and high pressure
b. High temperature and low pressure
c. High volume and high temperature
d. Low temperature and low pressure
B. High temp and low pressure
Which of the following geometries corresponds to a substance that has five sigma bonds and one nonbonding pair of electrons on the central atom?
a. Tetrahedron
b. Square Planar
c. Octahedron
d. Square pyramid
D. square pyramid
The relationship between the vapor pressure of a liquid and the heat of vaporization is expressed in the
a. Rydberg equation
b. Gibbs free energy equation
c. Clausius- Clapeyron equation
d. Arrhenius equation
C. Clausius-Clapeyron equation
What is the pH of a solution prepared by dissolving 0.1655 mole of hypochlorous acid in enough water to make 500 mL of solution? Ka is 3.0 x 10^-4
a. 1.00
b. 2.00
c. 5.4 x 10^-3
d. 1.76
B. 2.00B.
Substances whose Lewis structures must be drawn with an unpaired electron are called
a. ionic compounds
b. free radicals
c. resonance structires
d. polar molecules
b. free radicals
An ideal solution is a
a. mixture where two solvents cannot be dissolved in all ratios
b. mixture that has the same physical properties as the individual solvents
c. Mixture where the potential energy of the mixture is the same as that of the individual s
C.
Of the following pair of elements, which pair has the second element with the larger electronegativity based on its position in the periodic table?
a. oxygen, chromium
b. chlorine, iodine
c. calcium, cesium
d. sulfur, nitrogen
D. sulfur, nitrogen
Which of the following molecules is a strong electrolyte when dissolved in water?
a. Ch3COOH
b. HC2H3O2
c. PCl5
d. HBr
D. HBr
Which of the following is considered a metalloid?
a. Cr
b. Mn
c. Si
d. S
c. Si
Approximately how many half lives will it take to reduce 10.0 kg of a radioactive substance to 1.0 microgram substance?
a. 8
b. 13
c. 29
d. 34
D. 34
What is the conjugate acid of the H2PO4 ion?
a. HPO4
b. H2PO4
c. H3PO4
d. PO4
C. H3PO4
A first order reaction has a half life of 34 minutes. What is the rate constant for this reaction?
a. 3.4 x 10^-4
b. 2.04 x 10^-2
c. 2.9 x 10^-1
d. 34 mins
A. 3.4 x 10^-4
The rate law may be written using stoichiometric coefficients for which of the following?
a. Precipitation reactions
b. Acid - base reactions
c. Elementary processes
d. Solubility reactions
c. Elementary process
A certain radioactive material has a half life of 36 minutes. Starting with 10.0 grams of this material, how many grams will be left after 2 hours?
a. 1.00 grams
b. 1.5 x 10^-4 grams
c. 3.33 grams
d. 0.25 grams
A. 1.00 grams
Which is the strongest acid?
a. HBrO
b. HClO
c. HIO
d. HCLO3
D. HCLO3
All of these have the same electron configuration except?
a. Rb
b. Se
c. As
d. Sr
c. As