Balancing a Chemical Equation

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Background

A chemical equation for a chemical reaction is really a very compact code for all of the composition information related to the reaction substances. Before a chemical equation can be used to do substance mass calculations, however, the equation must be balanced. Textbook Discussion: Sections 5.4, pages 112. See Also: Example IIA and IIB, pages 113, and 114.

Problem

Use integer coefficients to balance the following chemical equation:

   WO₃ + H₂ ---> H₂O + W