Empirical And Molecular Formula Quiz -chemistry

10 Questions  I  By Webdesign2012 on March 12, 2012
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
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B.
C.
D.
2.  Empirical Formula: 79.8% Cu, 20.2% S
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B.
C.
D.
3.  Empirical Formula: 32.4% Na, 22.6% S, 45.0% O
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B.
C.
D.
4.  Empirical Formula: 62.6% Ca, 37.4% C
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B.
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D.
5.  Empirical Formula: 36.8%N, 63.2% O
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B.
C.
D.
6.  Empirical Formula: 1.90%H, 67.6%Cl, 30.5%O
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7.  Empirical Formula: 38.9%CL, 61.2%O
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8.  Empirical Formula: 60.0%C, 13.3%H, 26.7%O
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9.  Molecular Formula: 65.45%C, 5.45%H, 29.10%O; mol. wt= 110
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10.  Molecular Formula: 40.0%C, 6.7%H, 53.3%O; mol. wt= 180
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B.
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