GENERAL CHEMISTRY II MIDTERM
EXAM 2026/2027 ACTUAL QUESTIONS
WITH VERIFIED ANSWERS.
Vanadium crystallizes in a body centered cubic structure and
has an atomic radius of 131 pm. Determine the density of
vanadium, if the edge length of a bcc structure is 4r/sqrt3.
12.2 g/cm^3
3.06 g/cm^3
6.11 g/cm^3
2.77 g/cm^3
8.46 g/cm^3 - correct answer-6.11 g/cm^3
Which of the following is considered an atomic solid?
None of these is an atomic solid.
F2
Nb
N2
CsBr - correct answer-Nb
Which of the following is considered an ionic solid?
,XeF4
OCBr2
CCl4
None of these is an ionic solid.
(NH4)2CO3 - correct answer-(NH4)2CO3
NaCl crystallizes in a cubic unit cell with Cl- ions on each
corner and each face. How many Na+ and Cl- ions are in each
unit cell of NaCl?
2 Na+ ions and 2 Cl- ions
4 Na+ ions and 4 Cl- ions
1 Na+ ion and 1 Cl- ion
8 Na+ ions and 8 Cl- ions - correct answer-4 Na+ ions and 4 Cl-
ions
Identify an element that is NOT in nonoxide ceramics.
nitrogen
boron
silicon
aluminum
carbon - correct answer-aluminum
,Identify the element that is the best insulator.
tin
lead
carbon
silicon
germanium - correct answer-carbon
A common use of polyethylene terephthalate is
spray-on insulation.
films.
tire cord.
foam cups.
fishing line. - correct answer-tire cord
Which of the following ions should have the most exothermic
ΔHhydration?
Rb⁺
Ni2⁺
Al3⁺
Ba2⁺
Sr2⁺ - correct answer-Al3+
, Determine the solubility of N2 in water exposed to air at 25°C if
the atmospheric pressure is 2.0 atm. Assume that the mole
fraction of nitrogen is 0.78 in air and the Henry's law constant
for nitrogen in water at this temperature is 6.1 × 10^-4 M/atm.
1.6 × 10^-4 M
1.2 × 10^-4 M
1.1 × 10^-4 M
6.4 × 10^-4 M
9.5 × 10^-4 M - correct answer-9.5 * 10^-4 M
The Henry's law constant for helium gas in water at 30°C is
3.70 × 10^-4 M/atm. When the partial pressure of helium above
a sample of water is 0.650 atm, the concentration of helium in
the water is ________ M.
1.76 × 10^3
2.41 × 10^-4
5.69 × 10^-4
1.30
3.70 × 10^-4 - correct answer-2.41 * 10^-4
Which of the following concentration units is temperature
dependent?
molality
EXAM 2026/2027 ACTUAL QUESTIONS
WITH VERIFIED ANSWERS.
Vanadium crystallizes in a body centered cubic structure and
has an atomic radius of 131 pm. Determine the density of
vanadium, if the edge length of a bcc structure is 4r/sqrt3.
12.2 g/cm^3
3.06 g/cm^3
6.11 g/cm^3
2.77 g/cm^3
8.46 g/cm^3 - correct answer-6.11 g/cm^3
Which of the following is considered an atomic solid?
None of these is an atomic solid.
F2
Nb
N2
CsBr - correct answer-Nb
Which of the following is considered an ionic solid?
,XeF4
OCBr2
CCl4
None of these is an ionic solid.
(NH4)2CO3 - correct answer-(NH4)2CO3
NaCl crystallizes in a cubic unit cell with Cl- ions on each
corner and each face. How many Na+ and Cl- ions are in each
unit cell of NaCl?
2 Na+ ions and 2 Cl- ions
4 Na+ ions and 4 Cl- ions
1 Na+ ion and 1 Cl- ion
8 Na+ ions and 8 Cl- ions - correct answer-4 Na+ ions and 4 Cl-
ions
Identify an element that is NOT in nonoxide ceramics.
nitrogen
boron
silicon
aluminum
carbon - correct answer-aluminum
,Identify the element that is the best insulator.
tin
lead
carbon
silicon
germanium - correct answer-carbon
A common use of polyethylene terephthalate is
spray-on insulation.
films.
tire cord.
foam cups.
fishing line. - correct answer-tire cord
Which of the following ions should have the most exothermic
ΔHhydration?
Rb⁺
Ni2⁺
Al3⁺
Ba2⁺
Sr2⁺ - correct answer-Al3+
, Determine the solubility of N2 in water exposed to air at 25°C if
the atmospheric pressure is 2.0 atm. Assume that the mole
fraction of nitrogen is 0.78 in air and the Henry's law constant
for nitrogen in water at this temperature is 6.1 × 10^-4 M/atm.
1.6 × 10^-4 M
1.2 × 10^-4 M
1.1 × 10^-4 M
6.4 × 10^-4 M
9.5 × 10^-4 M - correct answer-9.5 * 10^-4 M
The Henry's law constant for helium gas in water at 30°C is
3.70 × 10^-4 M/atm. When the partial pressure of helium above
a sample of water is 0.650 atm, the concentration of helium in
the water is ________ M.
1.76 × 10^3
2.41 × 10^-4
5.69 × 10^-4
1.30
3.70 × 10^-4 - correct answer-2.41 * 10^-4
Which of the following concentration units is temperature
dependent?
molality
