12. According to the figure below, what is the most volatile substance shown? 800
760
700
Water
Benzene
600
Toluene
Anilinc
500
Pressure, mm Hg
400
300
200
100
20
40
60
80
140 160
180
200
100 120
Temperature,
a.
benzene
water
C. toluene
d. Aniline
b.

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.