Is it true that tests account for more than 90% of your chemistry grade?
Welcome to college! That’s just how it works.
Try googling the specific class’s syllabus (I found one just from “Vanderbilt chemistry syllabus,” and exams were indeed 90% of the grade).
Yup. I’m sure you will also find classes that exams will be 100% of the grade. This isn’t high school anymore.