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Worksheet 21: Mole calculations in formulas Topic 6: Moles

Set A: Terms and Definitions Objective: By defining these words, you should become more
familiar with mole related terms and their definitions.

Define, neatly and clearly, the following mole related terms.
1. Mole

2. Avogadro’s number

3. Molar mass

4. Gram-atomic mass
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5. Gram-formula mass
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6. Gram-molecular

7. Percent composition

8. Hydrate

9. Anhydrous
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Set B: Mole of atoms in formulas Objective: To test your ability to determine number of moles
and total number of moles of atoms in formulas

Determine the number of moles of each atom and the total number of moles of atoms in each formula.

Number of moles of each atom Total moles of atoms
10. 1 mole of H2SO4

11. 2 moles of Mg(OH)2
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12. 0.5 mole of C7H5(NO2)3

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