Quiz
Balancing Equations
a year ago by
blands_88385
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  • Question 1
    30 seconds
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    Q. At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?
    answer choices
    the product is doubled
    the product is half the mass of the reactants
    the mass is the same
    the mass changes depending on the reaction
  • Question 2
    30 seconds
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    Q. In chemical reactions, what does the principle of conservation of mass mean?
    answer choices
    Matter is not created or destroyed.
    The total mass of the reactants is greater than the total mass of the products.
    The total mass of the reactants is less than the total mass of the products.
    Matter is not changed.
  • Question 3
    30 seconds
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    Q. The red numbers in the image below represent ________
    answer choices
    subscripts
    coefficients
    I don't know, and don't want to try
    None of the answers are correct
  • Question 4
    30 seconds
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    Q. The blue numbers in the image below represent ________
    answer choices
    I don't know, and don't want to try
    coefficients
    subscripts
    none of the answers are correct
  • Question 5
    120 seconds
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    Q. The substances at the beginning of a chemical equation are called the ____
    answer choices
    product
    yield
    chemical symbol
    reactants
  • Question 6
    120 seconds
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    Q.

    What is the right part of a chemical equation called...

    H2 + O2 --> H2O

    answer choices

    Reactants

    Products

    Yields

    Chemical Equation

  • Question 7
    120 seconds
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    Q.

    What is the arrow in a chemical equation...

    H2 + O2 --> H2O

    answer choices

    Reactants

    Products

    Yields

    Chemical Equation

  • Question 8
    120 seconds
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    Q. When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced
    answer choices
    charge
    subscript
    random number
    coefficient
  • Question 9
    120 seconds
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    Q. What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__Al + __O2--> __Al2O3
    answer choices
    4,1 --> 2
    4,3 --> 4
    3,4 --> 1
    4,3 --> 2
  • Question 10
    120 seconds
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    Q. What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__H2SO3 + __KOH--> __H2O+ __K2SO3
    answer choices
    2,1 --> 2,1
    1,2 --> 1,1
    1,2 --> 1,2
    1,2 --> 2,1
  • Question 11
    120 seconds
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    Q. What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__H2 + __S --> __H2S
    answer choices
    1,1 --> 1
    2,2 --> 2
    1,2 --> 1
    1,2 --> 2
  • Question 12
    120 seconds
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    Q. What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__AgNO3 + __H2S --> __Ag2S+ __HNO3
    answer choices
    2,1 --> 1,2
    1,2 --> 1,1
    1,2 --> 1,2
    1,2 --> 2,1
  • Question 13
    120 seconds
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    Q. What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__CH4 + __O2 --> __CO2+ __H2O
    answer choices
    2,1 --> 2,1
    1,2 --> 1,1
    1,2 --> 1,2
    1,2 --> 2,1
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