1
.
The reaction
K(s) + 1/2 Cl2(g) + 2 O2(g) → KClO4(s)
has a ΔH = -432 kJ/mol. What is the ΔH of the reaction
2 KClO4(s) → 2 K(s) + Cl2(g) + 4 O2(g) ?
Student Response Correct Answer
A. -432 kJ/mol
B. +432 kJ/mol
C. -216 kJ/mol
D. +864 kJ/mol
E. +216 kJ/mol
Score: 0/0
2
.
Recently, buckyballs (C60) became the largest object with a measured de Broglie
wavelength. If the mass of a C60 molecule is 1.20 F 0
7 8
10-24 kg, what will be its de Broglie
wavelength if it is moving at a speed of 220 m/sec?
Student Response Correct Answer
A. 2.52 pm
B. 2.52 fm
C. 2.52 m
D. 1.20 pm
E. 5.22 m
Score: 0/0
3
.
Which of the following elements would you expect to have the greatest first ionization
energy?
Student Response Correct Answer
A. C
