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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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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

Reaction #2

before

after

after

before


Reaction 1

Reaction #1


Reaction 2

Reaction #2


Closing 5 min silent

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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