Balancing Equations
10th grade
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Chemistry
12 minutes ago
rsweaver
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  • Question 1
    120 seconds
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    Q.

    PCl5 + ___ H2O → ___ HCl + H3PO4

    answer choices

    4, 5

    1, 6

    3, 8

    2,2

  • Question 2
    120 seconds
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    Q.

    __ Al + __ FeO → Al2O2 + __ Fe

    answer choices

    1, 1, 2

    2,1,2

    2, 2, 2

    2,4,2

  • Question 3
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    Q.  Mg  +  ___ HCl  →   MgCl2  +   H2
    answer choices
    1
    2
    3
    4
  • Question 4
    30 seconds
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    Q. Which side of a chemical equation is the reactant side?
    answer choices
    Left (before the yields sign)
    Right (after the yields sign)
  • Question 5
    30 seconds
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    Q. Which side of a chemical equation os the product side?
    answer choices
    Left (before the yields sign)
    Right (after the yields sign)
  • Question 6
    120 seconds
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    Q. Which problem is balanced?
    answer choices
    PbO2 + 2H2
    SO2 + H20 --> H2SO4
    2Na + 2H2O --> 2NaOH + H2
  • Question 7
    180 seconds
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    Q. Balance this equation.
    _SnO2 +_H2-->_Sn +_H2O
    answer choices
    1,1,2,1
    1,2,1,1
    1,2,1,2
    1,2,2,1
  • Question 8
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    Q. Balance this equation.
    _CF4 + _Br2 -- _CBr4 + _F2
    answer choices
    2,1,2,1
    1,2,2,1
    1,2,1,2
    2,2,2,2
  • Question 9
    30 seconds
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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 10
    30 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 11
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    Q. Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe
    answer choices
    Yes
    No
  • Question 12
    180 seconds
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    Q. Balance this equation
    _Al +_HCl --> _H2 +_AlCl3
    answer choices
    2, 6, 3, 2
    it is already balanced
    4, 12, 3, 4
    2, 1, 4, 5
  • Question 13
    180 seconds
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    Q. Balance this equation.
    _CH4 + _O2 --> _CO2 + _H2O
    answer choices
    1,2,1,1
    2,1,2,1
    1,2,1,2
    0,2,0,2
  • Question 14
    180 seconds
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    Q. Balance this equation.
    _CF4 + _Br2 -- _CBr4 + _F2
    answer choices
    2,1,2,1
    1,2,2,1
    1,2,1,2
    2,2,2,2
  • Question 15
    45 seconds
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    Q. Is this equation balanced?
    answer choices
    yes
    no
    Not enough information
  • Question 16
    60 seconds
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    Q. How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
    answer choices
    2
    6
    1
    4
  • Question 17
    60 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 18
    30 seconds
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    Q. How many atoms of carbon (C) are in C6H12O6?
    answer choices
    3
    6
    12
    24
  • Question 19
    60 seconds
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    Q.

    The two sides of a chemical equation are called?

    answer choices

    Reactants (left) and Products (right)

    Ingredients (left) and Product (right)

    Cations and Anions

    Reactants (left) and Results (right)

  • Question 20
    60 seconds
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    Q. How many atoms are there TOTAL in:
    H2SO4
    answer choices
    6
    5
    7
    3
  • Question 21
    30 seconds
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    Q.

    Chemical reactions

    answer choices

    occur only in living organisms.

    create and destroy atoms.

    only occur outside living organisms.

    produce new substances.

  • Question 22
    30 seconds
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    Q.

    Which of the following is correct when used in a chemical equation?

    answer choices

    (g), grams

    (l), liters

    (aq), dissolved in water

    (s), solid product

  • Question 23
    30 seconds
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    Q.

    The symbol <--> indicates that

    answer choices

    heat must be applied

    an incomplete combustion reaction has occurred

    a gas is formed by the reaction

    the reaction is reversible.

  • Question 24
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    Q.

    What is the coefficient and symbol for fluorine?

    answer choices

    6F2

    F3

    6F

    3F2

  • Question 25
    30 seconds
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    Q.

    What are the coefficients that balance the skeleton equation __H2 + __O2 --> __H2O?

    answer choices

    2,1,2

    1,3,3

    3,1,3

    1,2,2

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