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Stoichiometry

Quiz by Morgan Rubink

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15 questions
Show answers
  • Q1
    30s
  • Q2
    30s
  • Q3
    How many grams of water are produced when 2 moles of hydrogen gas (H2) react with excess oxygen (O2) according to the balanced equation: 2H2 + O2 -> 2H2O?
    36 grams
    18 grams
    72 grams
    44 grams
    30s
  • Q4
    How many grams of ammonia (NH3) are formed from 2 moles of nitrogen gas (N2) reacting completely with hydrogen gas (H2) based on the balanced equation: N2 + 3H2 -> 2NH3? (The molar mass of nitrogen is 14 g/mol and hydrogen is 1 g/mol.)
    51 grams
    68 grams
    34 grams
    102 grams
    30s
  • Q5
    In the reaction: 2 H2 + O2 → 2 H2O, if you start with 4 g of hydrogen (H2), how many grams of water (H2O) will be produced?
    36 g
    18 g
    72 g
    8 g
    30s
  • Q6
    In the reaction: Zn + 2 HCl → ZnCl2 + H2, if you start with 65 g of zinc (Zn), how many grams of hydrogen gas (H2) will be produced?
    2 g
    4 g
    1 g
    6 g
    30s
  • Q7
    In the combustion of propane: C3H8 + 5 O2 → 3 CO2 + 4 H2O, how many grams of carbon dioxide (CO2) are produced from 44 g of propane (C3H8)?
    132 g
    176 g
    88 g
    44 g
    30s
  • Q8
    30s
  • Q9
    30s
  • Q10
    In a reaction between reactant A and reactant B, if reactant A is entirely consumed, what can be identified about reactant B?
    Both reactants are limiting.
    Reactant B is the limiting reactant.
    Reactant A is in excess.
    Reactant B is in excess.
    30s
  • Q11
    What happens to the amount of product formed when the limiting reactant is completely consumed?
    The reaction stops and no more product can be formed.
    The product will decompose.
    More product will continue to form.
    The reaction reverses.
    30s
  • Q12
    If you have excess of reactant C, but reactant D is the limiting reactant, what can you infer about the reaction?
    Reactant C will be consumed before reactant D.
    Reactant C will also limit the reaction.
    There will be no product formed.
    The amount of product formed is only dependent on reactant D.
    30s
  • Q13
    A chemist has 80 grams of a product, but the theoretical yield is 100 grams. What is the percent yield?
    80\%
    75\%
    85\%
    90\%
    30s
  • Q14
    In a chemical reaction, the theoretical yield of a product is 150 grams, but only 120 grams were actually produced. What is the percent yield of the reaction?
    80\%
    85\%
    70\%
    95\%
    30s
  • Q15
    Suppose a chemical reaction is supposed to produce 500 grams of a substance, but only 400 grams were obtained in the lab. What is the percent yield for this reaction?
    80\%
    90\%
    82\%
    70\%
    30s

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