Mole Calculations Review Worksheet - answers on next page ... - Free Printable

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1. a. LiOH: 23.95 g/mol
b. BaBr₂: 297.14 g/mol
c. Mg(C₂H₃O₂)₂: 142.39 g/mol
d. Ca(NO₃)₂: 164.09 g/mol

2. 1.69 × 10²⁴ molecules CH₄

3. 0.470 mol NaOH

4. 1.59 mol NaCl

5. 8.34 × 10²⁴ f.u. CaCO₃

6. a. 1.7 × 10²³ atoms Ni
b. 1.11 × 10²⁴ atoms S
c. 7.95 × 10²³ molecules F₂
d. 1.90 × 10²⁴ formula units K₃PO₄

7. 32.5 L O₂

8. 12.4 g NH₃

9. 1.05 × 10²⁵ total atoms

10. a. Fe₂O₃: Fe 69.94%, O 30.06%
b. Ca₃(PO₄)₂: Ca 38.76%, P 19.97%, O 41.27%
c. CH₄: C 74.87%, H 25.13%
d. H₂SO₄: H 2.06%, S 32.69%, O 65.25%

11. Empirical: C₉H₁₃NO₃, Molecular: C₉H₁₃NO₃

12. Empirical: Mg₃N₂

13. Empirical: C₅H₇N, Molecular: C₁₀H₁₄N₂

14. 3.55 × 10²² total ions

Parent Tip: Review the logic above to help your child master the concept of moles calculations worksheet.

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