Moles

A mole is defined as the number or quantity of a certain substance that has the same measurement of particles as are found in a 12 gram carbon gaining a -12. It follows the number 6.02x10²³ or also known as Avogadro’s number. This states that one mole of a certain element or compound contains 6.02x10²³ molecules of the given compound. 

Calculating the Moles of a compound

(1) Ca - 40.08 – 40.08             In the compound CaCO₃, there are 3 different
(1) C - 12.01 – 12.01               elements namely, Calcium (Ca), Carbon (C), 

(3) O - 16. 00 – 48.00              and Oxygen (O). There are 3 O, 1 C, & 1 Ca. 

                          -------              By getting the mass of each element, we 

                      100.09 u             can calculate their mass in Moles. 1 Ca 

                        CaCO₃                weighs 40. 08, 1 C weighs 12.01, & 3 O's 
                                                                 weigh 48.00,having 100.09 u or mol CaCO₃. 

100. 09 g/mol CaCO₃

_{Mole to Mass, Mass to Mole}

If you want to change the measurement of a certain compound to mole to mass, just change u or mol to g/mol and vise versa for mass to mole.




Exercises
     Calculate the moles of the following compounds and express your final answer with the unit g/mol (unit for mass):

          1. Bi₂O₃

          2. FeSO₄

          3. Ca (CH₃COO)₂

          4. (NH₄)₂Cr₂O₇

          5. AgNO₃

          6. Mg (ClO)₂

          7. Zn (IO4)₂

          8. CH₃ (CH₂)₃ COF

          9. CaSO₄

          10. CuCl₂

Reference

• http://chemistry.about.com/od/atomicmolecularstructure/a/moleculesmoles.htm

Group 7

Encarnacion

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