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Stoichiometry Concepts

Quiz by Donna Donohue

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12 questions
Show answers
  • Q1
    In order to perform a stoichiometry calculation you must always have
    a periodic table
    the molar mass for every compound and element
    a balanced equation
    an electronic balance
    30s
  • Q2
    To find the molar mass of an element or compound you need
    the molar ratio
    a periodic table
    a balance
    a balanced equation
    30s
  • Q3
    What is stoichiometry?
    The quantitative relationships between amounts of reactants used and products formed by a chemical reaction
    The relationship between the periodic table and the molar mass
    The relationship between you and your best friend
    The relationship between moles of each substance in a reaction
    30s
  • Q4
    The coefficients in a chemical equation tell you
    the percent composition
    the molar ratio
    the amount of product
    the molar mass
    30s
  • Q5
    Stoichiometry is based on the
    Avagadro's number
    Law of Conservation of Matter
    molar mass
    conversons
    30s
  • Q6
    What is a limiting reactant?
    is the reactant the is "left over"
    is always oxygen
    does not react
    the reactant that "runs out' first
    30s
  • Q7
    What is an excess reactant?
    The reactant that is "left over".
    the reactant that "runs out" first
    the reactant that reacts last
    the reactant that dos not react
    30s
  • Q8
    Which determines how much product you can make?
    the molar ratio
    the balanced equation
    the limiting reactant
    the molar mass
    30s
  • Q9
    A solid mass of 250 g is mixed with 100 g of a solution. A chemical reaction takes place and a gas is produced. The final mass of the mixture is 200g. How much gas was released into the air?
    250 g
    100 g
    200 g
    150 g
    30s
  • Q10
    When calculating percent yield, the theoretical yield is
    what you got in the lab
    the percentage
    the total of all the reactants
    What you were supposed to get according stoichiometry
    30s
  • Q11
    When calculating percent yield the actual amount would be
    the measurement you got in lab
    the amount you got using stoichiometry
    the molar mass
    the percentage
    30s
  • Q12
    What is the equation of percent yield?
    part/whole X 100
    actual yield/ theoretical yield X 100
    theoretical yield/actual yield X 100
    whole/part X 100
    30s

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