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Stoichiometry Mixed Practice

Quiz by Kylie Middleton

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19 questions
Show answers
  • Q1

     How many moles of O2 will be formed from 1.65 moles of KClO3? 

    2 KClO3 🡺 2 KCl + 3 O2

    2.47 mol

    8.42 mol

    0.14 mol

    2.48 mol

    30s
  • Q2

     How many moles of Fe2O3 are produced when 0.275 moles of Fe is reacted?

    4 Fe + 3 O2 🡺 2 Fe2O3 

    0.14 mol

    0.137 mol 

    0.2 mol

    .63 mol

    30s
  • Q3

    How many grams of Fe2O3 are produced when 42.7 grams of Fe is reacted? 

    4 Fe + 3 O2 🡺 2 Fe2O3

    61g 

    56g

    976g

    65g

    30s
  • Q4

    How many moles of O2 are produced when 1.26 moles of H2O is reacted? 

    2 H2O 🡺 2 H2 + O2

    .65 mol 

    45 mol 

    1.26 mol

    .63 mol

    30s
  • Q5

    How many moles of O2 will be formed from 3.76 grams of KClO3? 

    2 KClO3 🡺 2 KCl + 3 O2

    .046 mol 

    3.76 mol 

    .005 mol

    .05 mol

    30s
  • Q6

    If 2.9 grams of NO2 are made, how many moles of NO reacted?

           

                       2  NO + O2  🡺  2NO2

    .06 mol

    2.9 mol

    46 g

    .60 mol

    30s
  • Q7

    How many grams of O2 will be formed from 12.00 moles of KClO3 react? 

    2 KClO3 🡺 2 KCl + 3 O2

    32 g

    576g

    12 mol 

    420 g

    30s
  • Q8

      What mass of iron is needed to react with 16.0 grams of Sulfur?

    8 Fe + S8 → 8 FeS

    16g 

    224g

    28g

    256g

    30s
  • Q9

    How many moles  of FeS are produced from 36 grams of Iron?

    8 Fe + S8 → 8 FeS

    36 g 

    64 mol

    .64 mol

    .36 mol 

    30s
  • Q10

    What mass of copper (II) sulfide would be formed if 18.5 moles of copper reacts?

     8 Cu + S8 --> 8 CuS

    1776g

    18.5g

    142g

    17.76g

    30s
  • Q11

    What mass of water would be formed from the decomposition of 8.52 g of tin (IV) hydroxide?

     

    Sn(OH)4 -->SnO2 + 2H2O

    461g

    1.64g

    164g

    16.4g

    30s
  • Q12

    If the burning of propane (C3H8) produces 15.0 moles of carbon dioxide, how many moles of oxygen were used?

    C3H8 + 5O2 → 3CO2+ 4H2O

     

    15 mol

    250 mol

    25 mol

    2.5 mol

    30s
  • Q13

    What mass of Cd is produced if 85.0 g of Al2Se3 is produced?

     

    3CdSe + 2Al --> Al2Se3 + 3Cd

    291g

    85g

    98.14g

    112 g

    30s
  • Q14

    How many moles of HF will be needed to react with 48 grams of Tin, Sn?

                                                  Sn + 2HF --> SnF2+ H2

    48 mol

    81.1 mol

    96 mol 

    .81 mol

    30s
  • Q15

    What mass of H2SO4 would be required to react with 0.75 mol of NaOH?

    H2SO4 + 2NaOH --> Na2SO4 + 2H2O

    384g

    36.75g

    38g

    32g

    30s

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