The Mole

10 Questions  I  By Sullivanchem
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The Mole Quizzes & Trivia
This quiz will measure how prepared you are to take your exam on the mole next class. It contains the following types of problems: Molar Mass Grams-Moles Conversions Empirical Formula Molecular Formula

  
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Questions and Answers

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  • 1. 
    What is the molar mass of CH4 (methane)?
    • A. 

      12.01 g/mol

    • B. 

      13.02 g/mol

    • C. 

      16.05 g/mol

    • D. 

      32.10 g/mol


  • 2. 
    What is the molar mass of (NH4)2CO3 (Ammonium carbonate)?
    • A. 

      96.11 g/mol

    • B. 

      82.10 g/mol

    • C. 

      106.11 g/mol

    • D. 

      43.01 g/mol


  • 3. 
    What is the molar mass of Cu3(PO4)2?
    • A. 

      253.49 g/mol

    • B. 

      380.59 g/mol

    • C. 

      110.22 g/mol

    • D. 

      348.59 g/mol


  • 4. 
    Find the empirical formula of a substance that contains 62.6% Ca and 37.4% C.
    • A. 

      CaC2

    • B. 

      Ca10C4

    • C. 

      Ca5C3

    • D. 

      Ca7C10

    • E. 

      None of the above


  • 5. 
    Find the empirical formula of a compound that contains 36.8% N and 63.2% O.
    • A. 

      N16O

    • B. 

      N2O3

    • C. 

      N7O4

    • D. 

      N2O4

    • E. 

      None of the above


  • 6. 
    What is the molecular formula of a compound that contains 65.45%C, 5.45%H, and 29.10%O if the molar mass of the compound is 110 g/mol?
    • A. 

      C3H2O5

    • B. 

      C6H12O2

    • C. 

      C9H3O

    • D. 

      C3H7O4

    • E. 

      None of the above


  • 7. 
    How many grams of NaCl is present in 6.3 moles?
    • A. 

      9.27 g

    • B. 

      58.44 g

    • C. 

      231.2 g

    • D. 

      368.17 g

    • E. 

      None of the above


  • 8. 
    How many grams are in 2.3 moles of Na2SO4? (The molar mass of Na2SO4 is 142.05g/mol)
    • A. 

      61.76 g

    • B. 

      81.68 g

    • C. 

      163.36 g

    • D. 

      326.72 g

    • E. 

      None of the above


  • 9. 
    How many moles of LiBr are there in 486.30 g of LiBr? (The molar mass of LiBr = 86.84 g/mol)
    • A. 

      3.0 moles

    • B. 

      5.6 moles

    • C. 

      193.2 moles

    • D. 

      42,230.292 moles

    • E. 

      None of the above


  • 10. 
    How many moles of K­2O are in 367.38 g of K2O?
    • A. 

      3.9 moles

    • B. 

      5.9 moles

    • C. 

      367.38 moles

    • D. 

      34,607.2 moles

    • E. 

      None of the above


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