The Mole and Related Calculations - Answer Key

 

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  1. What is a mole?

    1 mole = 6.022 x 1023 particles        

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  2. How does the molecular formula relate to the number of moles?

    The molecular formula indicates the number of individual atoms of a particular element in a given molecule.  This value is directly equal to the number of moles of a given element within a mole of a molecule.

    3.  

     

  3. What is the molar mass of a compound?

                                                    number of grams
    1 mole

      4.  

    1. Calculate the molar mass of C6H6.

      78.12 g/mol

     

     

  4. In 3.35 x 1022 total atoms of CH3OH there are how many

      5.  

    1. Molecules

      5.58 x 1021 molecules of CH3OH

      2.  

    2. Moles

      0.00927 moles CH3OH

      3.  

    3. Grams

      0.297 g CH3OH

     

     

  5. How many grams of FeCl3 contain the same the number of total ions as 5.85g of Al2SO4?

    4.74 g FeCl3

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  6. How many atoms of oxygen are contained 14.82 g of C6H12O6?

    2.972 x 1023 atoms O

 

 

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