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WorksheetsQuiz simul pre Ch vacation
Total questions: 15
Worksheet time: 15mins
The vapor pressure of a solution containing a nonvolatile solute is directly proportional to the
molality of the solvent.
osmotic pressure of the solute
molarity of the solvent
mole fraction of solvent
mole fraction of solute
Which statement is false?
The compression factor Z for a given gas approaches 1 at
high pressure
The average kinetic energy of a gas sample is only dependent on T
Gases diffuse into each other and mix almost immediately when put into the same container
The molecular weight of a gaseous compound is a non-variable quantity
Pressure must be exerted on a sample of a gas in order to confine it
The diagram reports:
The hybridization of H to 1s and 1s*
The formation of H2 molecular orbitals from H atomic orbitals
The formation of H2 unstable isotope
The valence bond representation of H2 formation
none of these
Which molecule has a planar arrangement of all component atoms?
CH4
H2O
PCl3
NH3
BF3
Which one of the following statements is TRUE?
One mole of any acid will ionize completely in aqueous solution to produce one mole of H+ ions
At the same concentration, solutions of weak acids always have lower concentrations of H+ than solutions of strong acids
There are several common acids that are insoluble in water
All of the IA and IIA metal hydroxides are completely soluble in water
All weak acids are insoluble in water
Which one of the following is a strong electrolyte?
H2O
KF
HF
HNO2
(CH3)3N
Which of the following salts give acidic aqueous solutions?
(1) KNO3 (2) KCH3COO (3) NH4NO3 (4) RbI
(5) (NH4)2SO4 (6) BaCl2 (7) NaCN (8) KNO2
2, 7, 8
3, 5
2, 4, 6
1, 4, 7, 8
1, 4, 6
The following titration curve is the kind of curve expected for the titration of a ____ acid with a ____ base.
strong, strong
weak, strong
strong, weak
weak, weak
none of these
As the cell given below operates, the strip of silver gains mass (only silver) and the concentration of silver ions in the solution around the silver strip decreases, while the strip of lead loses mass and the concentration of lead increases in the solution around the lead strip. Which of the following represents the reaction that occurs at the negative electrode in the above cell?
Pb | Pb(NO3)2 (1.0 M) || AgNO3 (1.0 M) | Ag
Pb2+ + 2e- --> Pb
Pb --> Pb2+ + 2e-
Ag+ + e- --> Ag
Ag --> Ag+ + e-
none of the above
The half-reaction that occurs at the anode during the electrolysis of molten sodium bromide is:
2 Br- --> Br2 + 2 e-
Br2 + 2 e- --> 2 Br-
Na+ + e- --> Na
Na --> Na+ + e-
2 H2O + 2 e- --> 2 OH- + H2
Select the unsaturated hydrocarbon
CH4
C2H6
C2H4
C2H5OH
C3H8
Which does not describe a reaction at equilibrium?
Forward and backward reactions occur at equal rate
The system must be closed
Kc increases as the reaction progresses
Concentrations of reactants and products are constant
Qc=Kc
The solubility product expression for tin(II) hydroxide, is
[Sn2+] [OH-]
[Sn2+]2 [OH-]
[Sn2+] [OH-]2
[Sn2+]3 [OH-]
[Sn2+] [OH-]3
Which of the following compounds would be expected to have the highest melting point?
NaF
NaBr
NaI
NaCl
KCl
The enthalpy of combustion of butane gas (C4H10) is –2878 kJ mol–1.
Which statement is incorrect?
ΔH°f(C4H10,g) = –2878 kJ mol–1
Butane releases heat as it burns.
Combustion of butane is an exothermic process.
The enthalpy change that accompanies the combustion of 2.00 moles of butane is –5756 kJ.
The ΔG for the reaction is negative
