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Set B cont.
Number of moles of each atom Total moles of atoms
13. 1 mole of CuSO4.7H2O

14. 2 (NH4)3PO4

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15. 3 Fe2O3

Set C: Molar mass Objective: To test your ability to calculate the mass of one mole of a substance

Calculate the formula mass of the following compounds. Show work by Listing each elements in the
formula, their atomic mass, how many of each element, and the total mass of each element.
Elements Atomic mass How many Total mass Formula mass
18. Iron (III) sulfate
Fe2(SO4)3

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19. Ammonium chloride
trihydrate NH4Cl. 3H2O

20. Octane
C8H18
Need help? Study Book pg 124 Set 5

21. Sucrose
C 12H22O11

22. C6H12Cl2O2

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