Exam 2

A  N-O

B  C-N

C  C-C

D  Cl-Cl

E  C-F

A  4 bonding pair and 2 lone pairs

B  3 bonding pairs and 2 lone pairs

C  2 bonding pairs and 1 lone pair

D  6 bonding pair and 1 lone pair

E  2 bonding pairs and 3 lone pairs

A  142

B  27.6

C  102

D  35

E  32.3

A  Since the two metals have the same mass, the thermal energy contained in each metal after equilibrium will be the same.

B  Since the two metals have the same mass, the final temperature of the two metals will be 398 K, exactly halfway between the two initial temperatures.

C  Since the two metals have the same mass, the thermal energy contained in the iron and gold after reaching thermal equilibrium will be the same.

D  Since the two metals have the same mass, but the specific heat capacity of gold is much smaller than that of iron, the final temperature of the two metals will be closer to 298 K than to 498 K.

E  None of the above are true.

A  1.10 × 106 kJ

B  3.44 × 104 kJ

C  2.66 × 105 kJ

D  1.12 × 103 kJ

E  2.38 × 102 kJ

A  5

B  1

C  2

D  3

E  8

A  The uncertainty principle states that we can never know both the exact location and speed of an electron and an orbital is the volume in which we are most likely to find an electron.

B  The uncertainty principle states that we can never know both the exact location and speed of an electron.

C  The emission spectrum of a particular element is always the same and can be used to identify the element.

D  Part of the Bohr model proposed that electrons in the hydrogen atom are located in “stationary states” or particular orbits around the nucleus.

E  An orbital is the volume in which we are most likely to find an electron.

A  3

B  1

C  4

D  0

E  2

A  2

B  1

C  4

D  0

E  3

A  1

B  4

C  0

D  3

E  2