Chemistry

7th -

11thgrade

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Law of Conservation of Mass

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10 questions

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  • 1. Multiple Choice
    1.5 minutes
    1 pt
    How many elements does PbNO3 have?
    2
    3
    4
    5
  • 2. Multiple Choice
    1.5 minutes
    1 pt
    How many nitrogen atoms does NH3 have?
    1
    2
    3
    4
  • 3. Multiple Choice
    1.5 minutes
    1 pt
    A chemical equation tells us 
    the reactants and the products.
    the elements that make up the reactants and the products.
    the number of atoms that make up the reactants and the products.
    All of the above.
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