The Mole

10 Questions  I  By Sullivanchem
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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Question Excerpt

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1.  How many moles of LiBr are there in 486.30 g of LiBr? (The molar mass of LiBr = 86.84 g/mol)
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2.  What is the molar mass of (NH4)2CO3 (Ammonium carbonate)?
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3.  Find the empirical formula of a substance that contains 62.6% Ca and 37.4% C.
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4.  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?
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5.  How many grams of NaCl is present in 6.3 moles?
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6.  How many moles of K­2O are in 367.38 g of K2O?
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7.  What is the molar mass of Cu3(PO4)2?
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8.  What is the molar mass of CH4 (methane)?
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9.  Find the empirical formula of a compound that contains 36.8% N and 63.2% O.
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10.  How many grams are in 2.3 moles of Na2SO4? (The molar mass of Na2SO4 is 142.05g/mol)
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