A sample of gas at 300 K has the simplified speed distribution shown.
Speed interval (m s⁻¹) Fraction of molecules
0 – 200 0.18
200 – 400 0.34
400 – 600 0.26
600 – 800 0.16
800 – 1000 0.06
Molecules must have a minimum speed of 550 m s⁻¹ to react.
Based on the data, what is the best estimate of the fraction of molecules that can react?
a) 0.35
b) 0.29
c) 0.22
d) 0.13