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Lec-29-Chap-04-2 - Writing and Balancing Chemical Equations...

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Unformatted text preview: Writing and Balancing Chemical Equations • Write a word equation. • Convert word equation into formula equation. • Balance the formula equation by the use of prefixes (coefficients) to balance the number of each type of atom on the reactant and product sides of the equation. Example Hydrogen gas reacts with oxygen gas to produce water. Step 1. hydrogen + oxygen → water Step 2. H 2 + O 2 → H 2 O Step 3. 2 H 2 + O 2 → 2 H 2 O Example Iron(III) oxide reacts with carbon monoxide to produce the iron oxide (Fe 3 O 4 ) and carbon dioxide. iron(III) oxide + carbon monoxide → Fe 3 O 4 + carbon dioxide Fe 2 O 3 + CO → Fe 3 O 4 + CO 2 3 Fe 2 O 3 + CO → 2 Fe 3 O 4 + CO 2 CHE 131 Lecture 29 – Mole-Mass Conversions; Gases in Reactions Chapter 4: pp. 136-141. Chapter 10: pp. 454-457. The Mole and Chemical Reactions: The Macro-Nano Connection 2 H 2 + O 2 → 2 H 2 O 2 H 2 molecules 1 O 2 molecule 2 H 2 O molecules 2 moles H 2 molecules 1 mole O 2 molecules 2 moles H 2 O molecules 2 kmoles H...
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Lec-29-Chap-04-2 - Writing and Balancing Chemical Equations...

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