Balancing Chemical Equations
2 years ago
mr_cashin
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20 QuestionsShow answers
  • Question 1
    60 seconds
    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 2
    60 seconds
    Q. What is the left part of a chemical equation called?
    2H2 + O2 --> 2H2O
    answer choices
    Reactants
    Products 
    Yields 
    Chemical Equation 
  • Question 3
    60 seconds
    Q. What is the right part of a chemical equation called...
    2H2 + O2 --> 2H2O
    answer choices
    Reactants
    Products 
    Yields 
    Chemical Equation 
  • Question 4
    120 seconds
    Q. What is the total number of atoms present in 5Na3PO4
    answer choices
    5
    40
    55
    8
  • Question 5
    120 seconds
    Q. How many Mn atoms are found in the following compound?
    3Cr(MnO4)6
    answer choices
    3
    4
    6
    18
  • Question 6
    60 seconds
    Q. What is the little number after an element in a chemical equation called.
    Example: H2
    answer choices
    Coefficient 
    Subscript
    Atom
    Equation
  • Question 7
    120 seconds
    Q. Is the following equation balanced?...
    Al + O2 --> 2Al2O3
    answer choices
    Yes!
    No!
  • Question 8
    45 seconds
    Q. How many elements are in C6H12O6?
    answer choices
    1
    2
    3
    4
  • Question 9
    30 seconds
    Q. Element or compound?
    H2O
    answer choices
    Element
    Compound
  • Question 10
    30 seconds
    Q. Element or compound?
    O2
    answer choices
    Element
    Compound
  • Question 11
    60 seconds
    Q. What is the number before a chemical formula called?
    Ex: 2H2 + O2 --> 2H2O
    answer choices
    Coefficient
    Subscript
    Atom
    Equation
  • Question 12
    60 seconds
    Q. How many aluminum atoms are in Al2(SO4)3?
    answer choices
    1
    2
    3
    4
  • Question 13
    120 seconds
    Q. In which of these compounds are there twice as many oxygen atoms as hydrogen atoms?
    answer choices
    H3PO4
    H2SO4
    HClO3
    H2O
  • Question 14
    120 seconds
    Q. How many atoms are in the neurotransmitter serotonin? The formula for serotonin is C10H12N2O
    answer choices
    10
    20
    25
    23
  • Question 15
    120 seconds
    Q. What information could a student determine from only the chemical formula of a protein?
    answer choices
    The color of the protein
    The number of molecules in each sequence of the protein
    The physical arrangement of atoms in the structure of the protein
    The number of atoms of each element in the protein
  • Question 16
    120 seconds
    Q. Is the following equation balanced?
    2C2H2 + 5O2 --> 4CO2 + 2H2O
    answer choices
    yes
    no
  • Question 17
    120 seconds
    Q. Is the following equation balanced?
    4Fe + 3O2 --> 2Fe2O3
    answer choices
    yes
    no
  • Question 18
    120 seconds
    Q. Is the following reaction balanced?
    NaHCO3 --> Na2CO3 + H2O + CO2
    answer choices
    yes
    no
  • Question 19
    60 seconds
    Q. Is the following reaction balanced?
    2CH3OH + 3O2 --> 2CO2 + 4H2O
    answer choices
    yes
    no
  • Question 20
    120 seconds
    Q. Which of the following equations are correctly balanced?
    answer choices
    12CO2 +H2O --> C6H12O6 + O2
    CO2 + 9H2O --> C6H12O6 + O2
    CO2 + H2O --> 3C6H12O6 + O2
    6CO2 + 6H2O --> C6H12O6 + 6O2
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