Astudent needs to conduct a reaction that combines chemicals a and b to synthesize product ab. if we write this as a chemical equation it looks like: a+b→ab if this student combines 100 molecules of a and 100 molecules of b, the student obtains 100 molecules of ab. how many molecules of a would this student need to make 5000 molecules of ab? (assume the student had enough of molecule b to make 5000 molecules of ab.)