1) Calculate the percentage by mass of hydrogen in PtCl2(NH3)2.
A) 1.558
B) 1.008
C) 0.672
D) 0.034
E) 2.016
2) The rate of a reaction depends on ________.
A) collision frequency
B) collision energy
C) collision orientation
D) all of the above
E) none of the above
3) Which of the following is not a characteristic of metals?
A) acidic oxides
B) low ionization energies
C) malleability
D) ductility
E) These are all characteristics of metals.
4) The density of chlorine gas at 1.01 atm and 54.1 °C is ________ g/L.
A) 0.0376
B) 0.375
C) 0.228
D) 1.33
E) 2.67
5) S is positive for the reaction ________.
A) 2NO (g) + O2 (g) –> 2NO2 (g)
B) 2N2 (g) + 3H2 (g) –> 2NH3 (g)
C) C3H8 (g) + 5 O2 (g) –> 3CO2 (g) + 4 H2O (g)
D) Mg (s) + Cl2 (g) –> MgCl2 (s)
E) C2H4 (g) + H2 (g) –> C2H6 (g)
6) Which one of the following is least soluble in water?
A) CH3OH
B) CH3CH2CH2OH
C) CH3CH2OH
D) CH3CH2CH2CH2OH
E) CH3CH2CH2CH2CH2OH
7) What is the wavelength (angstroms) of a photon that has an energy of 4.38 X 10-18 J?
A) 45.4 angstroms
B) 2.30 X 107 angstroms
C) 6.89 X 1015 angstroms
D) 1.45 X 10-16 angstroms
E) 1.31 X 10-9 angstroms
8) Which of the following correctly represents the second ionization of calcium?
A) Ca (g) → Ca+ (g) + e–
B) Ca+ (g) → Ca2+ (g) + e–
C) Ca– (g) + e– → Ca2- (g)
D) Ca+ (g) + e– → Ca2+ (g)
E) Ca+ (g) + e– → Ca (g)
9) Calculate the pH of a solution at 25.0 oC that contains 1.94 x 10-10 M hydronium
ions.
A) 1.94
B) 4.29
C) 7.00
D) 14.0
E) 9.71
10) Of the following, ________ should have the highest critical temperature.
A) CBr4
B) CCl4
C) CF4
D) CH4
E) H2
11) The correct name for K2S is ________.
A) potassium sulfate
B) potassium disulfide
C) potassium bisulfide
D) potassium sulfide
E) dipotassium sulfate
12) A 0.133 mol sample of gas in a 525 mL container has a pressure of 312 torr. The
temperature of the gas is ________ °C.
A) 20.3
B) -253
C) -20.3
D) 203
E) 22.4