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Please Do Now (5 min)

Please Do Now (5 min). 38. Null. Review: In your own words, what is the Law of Conservation of Mass? What does it mean? New stuff: The pictures below show two different chemical reactions. For each one, write formulas for the element clumps on both sides of the arrow. Reaction #1.

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Please Do Now (5 min)

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  1. Please Do Now (5 min) 38 Null Review: In your own words, what is the Law of Conservation of Mass? What does it mean? New stuff: The pictures below show two different chemical reactions. For each one, write formulas for the element clumps on both sides of the arrow. Reaction #1 Reaction #2 before after after before

  2. Reaction #1

  3. Reaction #2

  4. Closing (5 min – SILENT) • 1. Clicker: Which of the following equations is balanced? • H2O H2 + O2 • Mg + 2Cl  MgCl2 • O2 + C  2CO • MgO  Mg + O2 • 2. Writing: How does balancing equations show you the Law of Conservation of Matter?

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