Balancing Chemical Equations
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20 QuestionsShow answers
  • Question 1
    300 seconds
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    Q.

    What is the Law of Conservation of Mass?

    answer choices

    It states that matter cannot be created or destroyed.

    It states that energy cannot be created or destroyed.

    It states that matter can be created or destroyed.

    It states that sound can be created or destroyed.

  • Question 2
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    Q. What is a coefficient?
    answer choices
    The small number on the right of the chemical symbol.
    The large number in front of a chemical formula.
    The number in between the chemical symbols.
    The number behind a chemical formula.
  • Question 3
    300 seconds
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    Q. What is the part of the chemical equation in green called? 
    Fe + S --> FeS
    answer choices
    products
    reactants
    yield
    chemical formula
  • Question 4
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    Q. What is the little number after an element in a chemical equation called.
    Example: H2
    answer choices
    Coefficient 
    Subscript
    Atom
    Equation
  • Question 5
    300 seconds
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    Q. What coefficient should be used to make the following equation balanced?
    N2+O2--> _NO 
    answer choices
    1
    2
    3
    4
  • Question 6
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    Q. Which problem is balanced?
    (Check ALL answers)
    answer choices
    PbO2 + 2H2
    SO2 + H20 --> H2SO4
    2Na + 2H2O --> 2NaOH + H2
  • Question 7
    300 seconds
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    Q. How many elements are in C6H12O6?
    answer choices
    1
    2
    3
    4
  • Question 8
    300 seconds
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    Q. Element or compound?
    H2O
    answer choices
    element
    compound
  • Question 9
    300 seconds
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    Q. How many HCl molecules do you need to balance this equation? 
    Mg +  __HCl --->  MgCl2 + H2
    answer choices
    1
    2
    3
    4
  • Question 10
    300 seconds
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    Q. Is this balanced?
    Al + O2 → 2Al2O3
    answer choices
    Yes
    No
  • Question 11
    300 seconds
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    Q.

    Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe

    answer choices

    yes

    no

  • Question 12
    300 seconds
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    Q.

    Balance this equation

    _Al +_HCl --> _H2 +_AlCl3

    answer choices

    2,6,3,2

    it's already balanced

    4,12,3,4

    2,1,4,5

  • Question 13
    300 seconds
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    Q. What does the Law of Conservation of Mass state?
    answer choices
    Matter cannot be gained or lost in a chemical reaction.
    Matter can only be lost in a chemical reaction.
    Matter can only be gained in a chemical reaction.
    Matter can be gained and lost in a chemical reaction. 
  • Question 14
    300 seconds
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    Q. What is the left part of a chemical equation called?
    2H2 + O2 --> 2H2O
    answer choices
    Reactants
    Products 
    Yields 
    Chemical Equation 
  • Question 15
    300 seconds
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    Q. What is the right part of a chemical equation called...
    2H2 + O2 --> 2H2O
    answer choices
    Reactants
    Products 
    Yields 
    Chemical Equation 
  • Question 16
    300 seconds
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    Q. What is the total number of atoms present in 5Na3PO4
    answer choices
    5
    40
    55
    8
  • Question 17
    300 seconds
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    Q. Is the following equation balanced?
    2C2H2 + 5O2 --> 4CO2 + 2H2O
    answer choices
    yes
    no
  • Question 18
    300 seconds
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    Q. Is the following equation balanced?
    4Fe + 3O2 --> 2Fe2O3
    answer choices
    yes
    no
  • Question 19
    300 seconds
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    Q. Is the following reaction balanced?
    NaHCO3 --> Na2CO3 + H2O + CO2
    answer choices
    yes
    no
  • Question 20
    300 seconds
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    Q. Is the following reaction balanced?
    2CH3OH + 3O2 --> 2CO2 + 4H2O
    answer choices
    yes
    no
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