if you're smart, you'll balance them all out. one chem, one math, and one GE the first quarter, one chem one math one GE one chem lab 2nd quarter, one math one chem one life science 3rd quarter
and then 2nd year you'll take chem phsyics and life science each quarter and finish up your lower div sciences in 2 years and hammer out your GEs at a community college (take two a summer) and then start hammering out your upper div core classes and science electives 3rd and 4th quarter.
if it sounds like a pain in the neck, its because it is. have fun