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Physical Science Ch 21

Quiz by 7-12 Sped

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13 questions
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  • Q1
    A(n) chemical equation has the same number of atoms of each element on each side of the equation.
    complex
    balanced
    simple
    30s
  • Q2
    Each substance on the left side of the arrow in a chemical equation is a _______.
    coefficient
    catalyst
    reactant
    30s
  • Q3
    If heat must be added to a chemical reaction for the reaction to take place, the reaction is _______.
    endothermic
    balanced
    exothermic
    30s
  • Q4
    What tyep of reaction is shown in the following chemical equation: NH3 + HC1 -> NH4Cl?
    decomposition
    synthesis
    double-displacement
    30s
  • Q5
    Which of the following could represent a decomposition reaction?
    compound = element + element
    compound + compound = compound + compound
    element + compound = element + compound
    30s
  • Q6
    A substance that speeds up a chemical reaction without being permanently changed itself is a(n) _________.
    coefficient
    catalyst
    inhibitor
    30s
  • Q7
    The breaking down of a substance into two or more simpler substances is _______.
    decomposition
    a catalyst
    displacement
    30s
  • Q8
    Each substance to the right of the arrow in a chemical equation is a(n) ____>
    reactant
    catalyst
    product
    30s
  • Q9
    Substances that prevent, or slow down, chemical reactions are called _____.
    catalysts
    inhibitors
    endothermics
    30s
  • Q10
    A chemical reaction in which heat energy is released is _____.
    exothermic
    endothermic
    flammable
    30s
  • Q11
    According to the law of conservation of mass, how does the mass of the products in a chemical reaction compare to the mass of the reactants?
    the masses are equal
    the mass of the products is greater
    there is no relationship
    30s
  • Q12
    What type of reaction is shown in the following chemical equation: 2H2) -> 2H2 + O2?
    double-displacement
    decomposition
    single-displacement
    30s
  • Q13
    The burning of wood in a campfire that produces heat and light would be both an ______ and an _______ reaction.
    exergonic, exothermic
    exergonic, endothermic
    endergonic, exothermic
    30s

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