Empirical And Molecular Formula Quiz -chemistry

10 Questions  I  By Webdesign2012
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Formula Quizzes & Trivia
Determine the empirical and molecular formula of each compound from its percentage composition.

  
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  • 1. 
    Empirical Formula: 39.8% K, 27.8% Mn, 32.5% O
    • A. 

      N3,Mn,5O

    • B. 

      K2,Mn,O4

    • C. 

      Mn3,K,O7

    • D. 

      O10,Mn,5K


  • 2. 
    Empirical Formula: 79.8% Cu, 20.2% S
    • A. 

      Cu5,S6

    • B. 

      S4,Cu10

    • C. 

      Cu9,S8

    • D. 

      Cu2,S


  • 3. 
    Empirical Formula: 32.4% Na, 22.6% S, 45.0% O
    • A. 

      Na4,S6,O23

    • B. 

      S5,Na16,O

    • C. 

      Na2,S,O4

    • D. 

      O20,S2,Na15


  • 4. 
    Empirical Formula: 62.6% Ca, 37.4% C
    • A. 

      Ca,C2

    • B. 

      C4,Ca10

    • C. 

      Ca5,C3

    • D. 

      Ca7,C10


  • 5. 
    Empirical Formula: 36.8%N, 63.2% O
    • A. 

      N16,O

    • B. 

      N2,O3

    • C. 

      O4,N7

    • D. 

      N2,O4


  • 6. 
    Empirical Formula: 1.90%H, 67.6%Cl, 30.5%O
    • A. 

      H2,O9,Cl5

    • B. 

      Cl5,O2,H7

    • C. 

      H,CL,O

    • D. 

      O17,Cl3,H9


  • 7. 
    Empirical Formula: 38.9%CL, 61.2%O
    • A. 

      Cl2,O7

    • B. 

      O3,Cl

    • C. 

      O,Cl

    • D. 

      Cl4,O8


  • 8. 
    Empirical Formula: 60.0%C, 13.3%H, 26.7%O
    • A. 

      H,C,O

    • B. 

      H2,O4,C2

    • C. 

      C8,O9,H3

    • D. 

      C3,H8,O


  • 9. 
    Molecular Formula: 65.45%C, 5.45%H, 29.10%O; mol. wt= 110
    • A. 

      C3,H2,O5

    • B. 

      C6,H12,O2

    • C. 

      H3,C9,O

    • D. 

      O4,H7,C3


  • 10. 
    Molecular Formula: 40.0%C, 6.7%H, 53.3%O; mol. wt= 180
    • A. 

      456

    • B. 

      56


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