Question 1
Use the graph of vapor pressure to determine the normal boiling point of O
2.

◦ 84 K
◦ 88 K
◦ 90 K
◦ 92 K
◦ O
2 doesn't boil because it is always a gas.
Question 2
Vanadium crystallizes in a body-centered cubic lattice, and the length of the edge of a unit cell is 305 pm. What is the density of V?
◦ 5.96 × 10
–30 g/cm
3◦ 2.98 × 10
–6 g/cm
3◦ 2.98 g/cm
3◦ 5.96 g/cm
3◦ 11.9 g/cm
3