Which represents the ground state for N?
A)option a
B)option b
C)option c
D)option d
E)option e
Choose the member of each set that best matches the label.
More metallicBe or Ba
More covalentN2O(g), MgO(s)
Highest electronegativityO, S, Br
A)Be, N2O, O
B)Ba, MgO, Br
C)Ba, N2O, S
D)Be, MgO, O
E)Ba, N2O, O
Which of the following contains the strongest bond?
A)N2
B)N2
–
C)N2
2-
D)N2
+
E)N2
2+
At a given temperature and pressure, a sample of Gas A is observed to diffuse twice as
fast as a sample of a different gas, B. Based on this:
A)The molar mass of A is one fourth that of B
B)The molar mass of A is one half that of B
C)The molar mass of A is 0.707 times that of B
D)The molar mass of A is 1.414 times that of B
E)The molar mass of A is four times that of B
Refer to the galvanic cell below (the contents of each half-cell are written beneath each
compartment):
The standard reduction potentials are as follows:
When current is allowed to flow, which species is reduced?
A) Cr2O7
2-
B) Cr3+
C) MnO4
–
D) Mn2+
E) H+
A chemical reaction produced 10.1 cm3of nitrogen gas at 23 °C and 746 mmHg. What
is the volume of this gas if the temperature and pressure are changed to 0 °C and 760
mmHg?
A)9.14 cm3
B)9.49 cm3
C)10.8 cm3
D)11.2 cm3
E)10.1 cm3
Which of the following statements is/are true?
I. Supersaturated solutions are very stable
II. The solubility of gases in liquids increases as the temperature is raised
III. The solubility of gases in liquids is independent of the external pressure
A)I and II only
B)I and III only
C)II and III only
D)II only
E)none are true
Which of the following statements is/are correct?
A) The value of is equal to zero in a concentration cell, and the value of is equal to
zero in any cell at equilibrium.
B) The value of can be equal to zero in a concentration cell, and the value of must
be equal to zero in a concentration cell.
C) The values of and e are equal to zero in any cell at equilibrium.
D) can never be equal to zero.
E) At least two of the above choice (A-D) are correct.
Which of the following mixtures would NOT be described as a buffer solution?
A) 0.15 M NH4Cl and 0.25 M NH3
B) 0.20 M NaOH and 0.40 M CH3COOH
C) 0.25 M HNO2and 0.15 M KNO2
D) 0.25 M HNO3and 0.15 M KNO3
E) 0.30 M NH3and 0.15 M HCl
Write a balanced equation for each of the following:
The largest electron affinities are found in the _____________ ____________ region of
the periodic table.
A) upper left
B) upper right
C) lower left
D) lower right
E) impossible to tell