CSUs calculate an overall eligibility index from your GPA and test scores and admit by that, so specific (passing) grades are not really considered. SAT subject tests are not included.
Calculation: https://secure.csumentor.edu/planning/high_school/eligibility_index.asp
SJSU thresholds by major: http://info.sjsu.edu/static/admission/impaction.html
Of course, if you passed with C grades in high school chemistry, you should be aware that chemistry in college will be more difficult.