Science, Chemistry

9th -

10thgrade

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Chemical Reactions

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10 questions

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  • 1. Multiple Choice
    30 seconds
    1 pt
    In a ___________change, a substance changes into a different substance.
    Physical
    Chemical
  • 2. Multiple Choice
    30 seconds
    1 pt
    The Law of Conservation of Mass states
    that matter exists in all states and reacts the same
    that matter can only be changed into new substances by introducing a catalyst
    that matter exists in the same state throughout any chemical change
    that matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants
  • 3. Multiple Choice
    30 seconds
    1 pt
    How many Al atoms are in this compound?         4Al2O3
    2
    8
    6
    4
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