This is a series of lectures in videos covering Chemistry topics taught in High Schools.

This video demonstrates how to balance reactions using coefficients.

This video explains how to add the coefficients of a balanced reaction up.

How to complete and balance a word equation, given the names of the substances in the reaction.

The Law Of Conservation Of Mass states that mass cannot be created or destroyed by physical or chemical change. Missing Mass problems are a great way to see how this works!

Rotate to landscape screen format on a mobile phone or small tablet to use the **Mathway** widget, a free math problem solver that **answers your questions with step-by-step explanations**.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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