This page will introduce or help refresh your knowledge on the chemical equations and stoichiometry of chemistry.
The videos to the right will explore the law of conservation of mass, interconverting masses/moles/number of particles, how to use mole to mole ratio, stoichiometry, theoretical/actual/percent yield, and molarity and dilutions. Be sure to view all videos.
Many of the videos contain practice problems. Pause the video to try the practice problems yourself before continuing on.
Everything in our universe has mass — from the smallest atom to the largest star. But the amount of mass has remained constant throughout existence even during the birth and death of stars, planets and you. How can the universe grow while maintaining its mass? Todd Ramsey answers that question by unravelling the law of conservation of mass.
This tutorial covers how to convert in between grams, moles and numbers of atoms or molecules using balanced equations.
In this video, you will learn when and how to use mole to mole ratios and feel confident enough to do it on your own!
Stoichiometry: meaning of coefficients in a balanced equation; coefficient and molar ratios, mole-mole calculations, mass-mass calculations, mass-particle calculations, and mass-volume calculations.
This chemistry tutorial covers the difference between actual, theoretical and percent yields and include examples of how to calculate theoretical and percent yields.
Molarity formula, dilution formula, and practice problems.
Step by step solution of stoichiometry of a reaction solution.
