Chemistry 161. Test Three. April 10, 2015. Name _____________________________________________(
This test is pledged non-disclosure until it is returned. R = 0.08206 L atm / mol K
c = 3.00 x 109 m/sec
E = h
/80)
h = 6.626 x 10-34 J sec
Part One. 30 points, 2 points each.
_____1) A gas will have ideal behavior at
a- high pressure and low temperature
b- low pressure and low temperature
c- low pressure and high temperature
d- high pressure and high temperature
_____2) A gas has a pressure of 253.6 mmHg. This is equivalent to
a- 0.3337 atm
b- 253.6 atm
c- 2.997 atm
d- 0.9284 atm
_____3) The combustion of 1.334 g of naphthalene, C10H8, releases 26.55 kJ of heat. The molar heat of the reaction is
a- 35.42 kJ
b- 3403 kJ
c- 2551 kJ
d- 19.90 kJ
_____4) What is the energy of red light at 714 nm?
a- 1.58 x 10-34 J
b- 1.99 x 10-24 J
c- 3.60 x 1017 J
d- 2.78 x 10-18 J
_____5) Which of the following orbitals does not exist?
a- 4s
b- 3f
c- 2p
d- 5d
_____6) SO3 gas diffuses through a system at a rate of 12.5m/min. A second gas diffuses through the same system at a
rate of 16.5 m/min. What is the unknown gas?
a- NO2
b- NO3
c- N2O4
d- NO
_____7) Heat is given off by a system as work is done on the system.
a- q is positive and w is negative
b- q is negative and w is negative
c- q is negative and w is positive
d- q is positive and w is positive
_____8) A 10.0 piece of aluminum (specific heat capacity 0.903 J/g/oC) is heated to 120. oC and placed into 100. g of
water at 20.0 oC. The resulting temperature is
a- 122 oC
b- 22 oC
c- 98 oC
d- 15.8 oC
_____9) For the following sets of quantum numbers, which set doesn’t exist?
a- n = 3, l = 2, ml = -1, ms = + ½
b- n = 2, l = 0, ml = 0, ms = - ½
c- n = 5, l = 1, ml = 0, ms = + ½
d- n = 3, l = 3, ml = 3, ms = - ½
_____10) In the ground state, copper has an electron configuration of
a- 1s2 2s2 2p6 3s2 3p6 4s2 3d9
b- 1s2 2s2 2p6 3s2 3p6 4s1 3d10
c- 1s2 2s2 2p6 3s2 3p6 3d10 4p2
d- 1s2 2s2 2p6 3s2 3p6 3d11
_____11) A gas is measured at STP.
a- STP is one atmosphere and 300.00 K
b- STP is one atmosphere and 273.15 K
c- STP is 1000. mmHg and 273.15 K
d- STP is 700. mmHg and 373.15 K
_____12) Which of the following as not a proper designation for a d orbital?
a- z2
b- xz
c- x2+y2
d- yz
Part Two.
1) (12 points) Definitions
Enthalpy
Heat capacity
Pauli Exclusion Principle
Hund’s rule
2) (8 points) Nomenclature.
Name
a-
Ionic or Molecular Formula
Nitric acid
b-
CoCl3
c-
Strontium sulfide
d-
N2O5
3) (6 points each) What is the enthalpy of the following reactions?
N2O4 (g)
C3H8 (l)
+
+
2 CO (g)
O2(g)


2 NO (g)
CO2(g)
+
+
2 CO2(g)
H2O(g)
Hof =
Hof =
HCl (aq)
+
Fe(OH)3(s)

FeCl3(aq)
+
H2O(l)
Hof =
4) (6 points) What is the density (in g/L) of hydrogen gas at 20.0 oC and 1655 torr?
5) (8 points) Give the complete ground state electron configuration for each of the following
Cr
S
Ba
Ag