Hi, what do you want to do?
Curated Video
Chemistry - Calculating Percent (%) Composition
Percent composition is the percent of total mass of one element in a compound. We can find the percent composition by using this formula: mass of element/total mass of compound times 100. In this video, we will cover what percent...
Professor Dave Explains
IIT/JEE Chemistry Practice #8: Molecular Formulas
Practice REAL problems from actual past IIT/JEE exams with Professor Dave!
Khan Academy
Khan Academy: Chemistry: Molecular and Empirical Formulas
A video lecture explaining how to find the molecular and empirical formula knowing the percent composition of each element. The problem is solved in easy to follow steps. [9:30]