Molar Mass Percent Composition by xqg16657

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									                             Molar Mass & Percent Composition

Objective: To understand the relationship between the mass and number of particles of a
substance.
Procedure:
   1. Measure the mass of calcium carbonate found in the 50 mL beaker.
   2. Determine the molar mass of calcium carbonate.
   3. Determine the amount of moles calcium carbonate present in the sample.
   4. Determine the number of molecules of calcium carbonate present in the sample.
   5. Determine the mass of oxygen present in the sample of calcium carbonate.

Extension of the mole concept:
       Is there a way to solve the problem below using the concept of the mole? Try.
       Calcium carbonate decomposes to produce calcium oxide and carbon dioxide. What
       would be the mass of calcium oxide formed if 100. g of calcium carbonate decomposed?


                             Molar Mass & Percent Composition

Objective: To understand the relationship between the mass and number of particles of a
substance
Procedure:
   1. Measure the mass of aluminum found in the 50 mL beaker.
   2. Determine the molar mass of aluminum.
   3. Determine the amount of moles aluminum present in the sample.
   4. Determine the number of atoms of aluminum present in the sample.

Extension of the mole concept:
       Is there a way to solve the problem below using the concept of the mole? Try.
       Aluminum reacts with oxygen to form aluminum oxide. What mass of aluminum would
       be required to produce 102 g of aluminum oxide?


                             Molar Mass & Percent Composition

Objective: To understand the relationship between the mass and number of particles of a
substance.
Procedure:
   1. Measure the mass of sugar found in the 50 mL beaker.
   2. Determine the molar mass of sugar (C6H12O6).
   3. Determine the amount of moles sugar present in the sample.
   4. Determine the number of molecules of sugar present in the sample.
   5. Determine the mass of carbon present in the sample of sugar.

Extension of the mole concept:
       Is there a way to solve the problem below using the concept of the mole? Try.
       What mass of oxygen would be needed to react with 180 g of C6H12O6?

       C6H12O6       +        O2                   CO2       +        H2O

								
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