The Compound RX3 Decomposes According to the Equation 3RX₃ →

Multiple Choice

The compound RX3 decomposes according to the equation 3RX₃ → R + R₂X₃ + 3X₂
In an experiment the following data were collected for the decomposition at 100°C. What is the average rate at which RX₃ is disappearing over the entire experiment?
T(s) [RX₃](mol L^-1)
0 0.85
2 0.67
6 0.41
8 0.33
12 0.20
14 0.16

A) 0.011 mol L^-1s^-1
B) 0.019 mol L^-1s^-1
C) 0.044 mol L^-1s^-1
D) 0.049 mol L^-1s^-1
E) 0.069 mol L^-1s^-1