Chemical Equations
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20 QuestionsShow answers
  • Question 1
    30 seconds
    Q. How many atoms of carbon (C) are in C6H12O6?
    answer choices
    3
    6
    12
    24
  • Question 2
    30 seconds
    Q. How many Sodium (Na) are in 6NaCl?
    answer choices
    1
    12
    6
  • Question 3
    30 seconds
    Q. How many Aluminum are in Al2O3?
    answer choices
    3
    2
    5
  • Question 4
    30 seconds
    Q. How many Hydrogen are in 4H2O?
    answer choices
    6
    8
    2
    4
  • Question 5
    120 seconds
    Q. Which of the following shows the correct way to balance the chemical equation?
    Fe + O2 -> Fe2O3
    answer choices
    4Fe + 3O2 -> 2Fe2O3
    2 Fe + 3O2 -> Fe2O6
    4 Fe + O6 -> 2Fe2O3
    None of the options are correctly balanced.
  • Question 6
    120 seconds
    Q. Which of the following reactions is balanced?
    answer choices
    2CH4 + O2 -> CO2 + H2O
    CH4 + 2O2 -> CO2 + H2O
    CH4 + 2O2 -> CO2 + 2H2O
    None of the chemical equations are balanced.
  • Question 7
    60 seconds
    Q. How many HCl molecules do you need to balance this equation? 
    Mg +  __HCl --->  MgCl2 + H2
    answer choices
    1
    2
    3
    4
  • Question 8
    120 seconds
    Q. Balance this equation.
    _CF+ _Br-- _CBr+ _F2
    answer choices
    2,1,2,1
    1,2,2,1
    1,2,1,2
    2,2,2,2
  • Question 9
    120 seconds
    Q. Balance this equation.
    _CH4 + _O--> _CO+ _H2O
    answer choices
    1,2,1,1
    2,1,2,1
    1,2,1,2
    0,2,0,2
  • Question 10
    120 seconds
    Q. Balance this equation
    _Al +_HCl --> _H+_AlCl3
    answer choices
    2, 6, 3, 2
    it is already balanced
    4, 12, 3, 4
    2, 1, 4, 5
  • Question 11
    30 seconds
    Q. The substances listed on the right side of a chemical equation are the
    answer choices
    Yields
    Reactants
    Products
    Precipitates
  • Question 12
    30 seconds
    Q. The substances listed on the left side of a chemical equation are the
    answer choices
    Products
    Coefficients
    Precipitates
    Reactants
  • Question 13
    30 seconds
    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 14
    30 seconds
    Q. Identify the reactant(s) and product(s) of the reaction.
    answer choices
    All three are reactants and none are products.
    Hydrogen and water are the reactants, and oxygen is the product.
    Water and oxygen are the reactants, and hydrogen is the product.
    Hydrogen and oxygen are the reactants, and water is the product.
  • Question 15
    30 seconds
    Q.

    Which is the Law of Conservation of Matter?

    answer choices

    matter cannot be created or destroyed, it only rearranges

    matter can be created but it cannot be destroyed, it never rearranges

    matter can be destroyed but it cannot be created, it usually just rearranges

    matter is an unproven theory created by Hans Geiger

  • Question 16
    120 seconds
    Q. Which one is a compound?
    answer choices
    Co
    Br
    Fe
    CO
  • Question 17
    120 seconds
    Q. Which one is an element?
    answer choices
    Co
    CO
    CO2
    CO3-2
  • Question 18
    120 seconds
    Q. How many elements are found in the following molecule? Mg(ClO3)2
    answer choices
    1
    4
    3
    5
  • Question 19
    900 seconds
    Q. Which number should go in the blank?
    _ H2 + O2 -> 2 H2O
    answer choices
    1
    2
    3
    0
  • Question 20
    900 seconds
    Q. Which number should go in the blank?
    2 Na+ _ Cl2 -> 2 NaCl
    answer choices
    1
    2
    3
    0
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