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Unit 3 Review

Unit 3 Review. Question 1. Calculate the % of Ca in calcium carbonate? 39.97% Ca. Question 2. Calculate the % of P in calcium phosphate? 19.97% P. Question 3.

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Unit 3 Review

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  1. Unit 3 Review

  2. Question 1 • Calculate the % of Ca in calcium carbonate? • 39.97% Ca

  3. Question 2 • Calculate the % of P in calcium phosphate? • 19.97% P

  4. Question 3 • Analysis of a compound shows that the compound contains 26.67% S, 53.33% O, and 20.00% Mg. What is the empirical formula of this compound? • MgSO4

  5. Question 4 • What is the empirical formula of a compound having 38.76% Cl and 61.24% O? • Cl2O7

  6. Question 5 • A compound has an empirical formula of C3H8. What is the molecular formula if the molar mass if 44 g/mol? • C3H8

  7. Question 6 • A compound has an empirical formula of C5H11. What is the molecular formula if the molar mass if 142 g/mol? • C10H22

  8. Question 7 • A compound has an empirical formula of CH. What is the molecular formula if the molar mass if 52 g/mol? • C4H4

  9. Question 8 • A compound is contains 46.7% nitrogen and 53.3% oxygen. If the molecular mass of the compound is 60.0 g/mol, what is the molecular formula? • N2O2

  10. Question 9 • A compound is found to contain 24.8% carbon, 2.0% hydrogen and 73.2% chlorine with a molecular mass of 96.9 g/mol. What is the molecular formula? • C2H2Cl2

  11. Question 10 • A compound containing 40.0% carbon, 5.7% hydrogen and 53.3% oxygen has an atomic mass of 175 g/mol. What is the molecular formula? • C6H12O6

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