Estimate the CMC of a C12 alkyl sulfate at 25C using equation given in the lecture notes - use appropriate values for constants from lecture notes. Indicate the correct answer below. Calculate answer to one decimal accuracy. 2.1mM 1.2mM 3.6mM 7.9mM Question 13 2 pts Addition of a benzene ring is equivalent to how many linear CH2 groups for estimation of CMC and surface properties? 1.5CH2 group 12CH2 groups 6CH2 grops 3.5CH2 groups