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Law of Conservation of Mass

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  • 1. Multiple Choice
    1 minute
    1 pt
    Which is Chemical Equation is Balanced?
    CH₄+O₂------CO₂+2H₂O
    H₂+O₂-----2H₂O₄
    4Al+3O₂-----2Al₂O₃
  • 2. Multiple Choice
    30 seconds
    1 pt
    B₂ + 3W₂ => 2BW₃
    Balanced
    Unbalanced
  • 3. Multiple Choice
    30 seconds
    1 pt
    Which are chemical changes
    Iron rusting 
    Glass breaking
    Clothing ripping
    Hair cut
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