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7.2 Evidence of a Chemical Reaction

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7.4 How to Write Balanced <strong>Chemical</strong> Equations<br />

3. If an element occurs as a free element on<br />

either side <strong>of</strong> the chemical equation, balance<br />

it last. Always balance free elements by<br />

adjusting the coefficient on the free element.<br />

4. If the balanced equation contains coefficient<br />

fractions, change these into whole numbers<br />

by multiplying the entire equation by the<br />

appropriate factor.

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