Chemical Reactions: Types and Balancing
3 years ago
tspinek
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24 QuestionsShow answers
  • Question 1
    30 seconds
    Q. What is the Law of Conservation of Mass?
    answer choices
    It states that no matter can be created or destroyed.
    It states that no energy can be created or destroyed.
    It states that matter can be created or destroyed.
    It states that no sound can be created or destroyed.
  • Question 2
    30 seconds
    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 3
    30 seconds
    Q. A + B → AB : is the general form for which reaction type?
    answer choices
    Double Replacement
    Synthesis
    Combustion
    Decomposition
  • Question 4
    30 seconds
    Q. Which of the following is an example of synthesis?
    answer choices
    2Na + Br--> 2NaBr
    2KClO--> 2KCl + 3O2
    2HgO + Cl2-->2HgCl + O2
    Cl2 + 2NaBr --> 2NaCl + Br2
  • Question 5
    30 seconds
    Q. Identify the type of reaction:  
    Ca + O --> CaO
    answer choices
    Decomposition
    Synthesis
    Double Replacement
    Combustion
  • Question 6
    30 seconds
    Q. Identify this type of reaction,
    Cl2 + 2KI -->  I2 + 2KCl
    answer choices
    Synthesis
    Single Replacement
    Double Replacement
    Decomposition
  • Question 7
    30 seconds
    Q. Which chemical reaction forms Carbon Dioxide and Water?
    answer choices
    Double Replacement
    Single Replacement
    Combustion
    Decomposition
  • Question 8
    30 seconds
    Q. Which chemical reaction breaks down into 2 substances?
    answer choices
    Double Replacement
    Single Replacement
    Synthesis
    Decomposition
  • Question 9
    30 seconds
    Q. Which reaction type is the following: 2AgF + CaCl2 --> 2AgCl + CaF2
    answer choices
    Decomposition
    Single Replacement
    Synthesis
    Double Replacement
  • Question 10
    30 seconds
    Q. Which reaction type is the following:  2Na + CaF2 --> Ca + 2NaF
    answer choices
    Decomposition
    Single Replacement
    Synthesis
    Double Replacement
  • Question 11
    30 seconds
    Q. Which of the following is the general formula for a decomposition reaction?
    answer choices
    A + B  → AB
    AB → A + B
    AB + C → AC + B
    AB + CD → AC + BD
  • Question 12
    30 seconds
    Q. Which reaction type is the following: C5H10O4 + O2 --> CO2 + H2O
    answer choices
    Decomposition
    Single Replacement
    Combustion
    Double Replacement
  • Question 13
    30 seconds
    Q. Which reaction type is the following:  Fe + O2 --> Fe2O3
    answer choices
    Decomposition
    Single Replacement
    Synthesis
    Double Replacement
  • Question 14
    30 seconds
    Q. This picture of a football is here for no reason.  
    Click CONTINUE to move on.
    answer choices
    CONTINUE
    I don't follow directions.
  • Question 15
    30 seconds
    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 16
    30 seconds
    Q. What is a coefficient?
    answer choices
    The small number on the right of the chemical symbol.
    The large number to the left of a formula.
  • Question 17
    60 seconds
    Q. What coefficient should be used to make the following equation balanced?
    N2+O2--> _NO 
    answer choices
    1
    2
    3
    4
  • Question 18
    30 seconds
    Q. What goes in the missing blanks?
    SnO2 + __ H2 → Sn + __ H2O
    answer choices
    5
    1
    3
    2
  • Question 19
    30 seconds
    Q. Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe
    answer choices
    Yes
    No
  • Question 20
    30 seconds
    Q. Balance this equation:
     __Li + __Cl2 -> __LiCl
    answer choices
    2Li + Cl2 -> 4LiCl2
    2Li + Cl2 -> LiCl2
    2Li +  Cl2 -> 2LiCl
  • Question 21
    30 seconds
    Q. Balance this equation...
    HgO --> 2Hg + O2
    answer choices
    It is balanced 
    2HgO --> Hg + O2
    2HgO --> 2Hg + O2
  • Question 22
    60 seconds
    Q. Which of the following is an unbalanced equation?
    answer choices
    CaCO--> CaO + CO2
    PbO+ 2H2-->2Pb + H2O
    2Na+ 2H2O-->2NaOH + H2
    CS+ 2O--> CO+ 2SO2
  • Question 23
    60 seconds
    Q.  Fill in the missing coefficient to balance the equation:                   Mg  +  ___ HCl  →   MgCl2  +   H2
    answer choices
    1
    2
    3
    4
  • Question 24
    60 seconds
    Q. Which problem is balanced?
    answer choices
    PbO2 + 2H2
    SO2 + H20 --> H2SO4
    2Na + 2H2O --> 2NaOH + H2
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