Hi, I am a junior, currently writing a research paper on usage of calculus, especially differentiation, in chemistry. But I am having a lot of trouble trying to find sources. What are some good website sources for this topic?
You're having trouble finding sources because you're looking in the wrong place (websites). Go to a library and check out a college-level physical chemistry textbook (e.g Engel and Reid). That should have all of the information you need.
Radiatiove decay, in order to know how much time it takes for a contaminated area to be safe.
Chemical kinetics, used to predict a reaction's speed or to determine the mechanism of a reaction (especially in organic chemistry).
Quantum mechanics, in which the use of calculus and differential equations (which is a tool completely based on calculus, anyway) determines the behavior of atoms and molecules.
Many branches of physical chemistry use calculus as well.