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Name Period Date Unit 4 Review Worksheet #2 Empirical and Molecular Formulas Directions: Please complete this on a separate piece of paper. 1. What is the empirical formula and empirical formula mass of each of the following compounds? a. C₂H4 b. C₂H6O2 c. N₂O5 d. Ba3(PO4)2 e. Teal16 2. What is the molecular formula of each compound? a. Empirical Formula CH (M = 78.11 g/mol) b. c. Empirical Formula C3H6O2 (M = 74.08 g/mol) Empirical Formula HgCl (M= 472.1 g/mol) d. Empirical Formula C7H4O2 (M = 240.20 g/mol) 3. A chloride of silicon contains 79.1% Cl. If the molar mass is 269 g/mol, what is the empirical and molecular formula? 4. Cortisol (M = 362.47 g/mol), one of the major steroid hormones, is a key factor in the synthesis of protein. Its profound effect on the reduction of inflammation explains its use in the treatment of rheumatoid arthritis. Cortisol is 69.6% C, 8.34% H, and 22.1% 0. What is its empirical and molecular formula? 5. A 50.51 g sample of a compound made from phosphorus and chlorine is decomposed. Analysis of the products showed that 11.39 g of phosphorus atoms were produced. What is the empirical formula of the compound? 6. When 2.5000 g of an oxide of mercury (HgxOy) is decomposed into the elements by heating, 2.405 g of mercury are produced. Calculate the empirical formula. 7. A component of protein called serine has an approximate molar mass of 100 g/mole. If the percent composition is as follows, what is the empirical and molecular formula of serine? C=34.95% H=6.844% 0=46.56% N = 13.59%

Name Period Date Unit 4 Review Worksheet #2 Empirical and Molecular Formulas Directions: Please complete this on a separate piece of paper. 1. What is the empirical formula and empirical formula mass of each of the following compounds? a. C₂H4 b. C₂H6O2 c. N₂O5 d. Ba3(PO4)2 e. Teal16 2. What is the molecular formula of each compound? a. Empirical Formula CH (M = 78.11 g/mol) b. c. Empirical Formula C3H6O2 (M = 74.08 g/mol) Empirical Formula HgCl (M= 472.1 g/mol) d. Empirical Formula C7H4O2 (M = 240.20 g/mol) 3. A chloride of silicon contains 79.1% Cl. If the molar mass is 269 g/mol, what is the empirical and molecular formula? 4. Cortisol (M = 362.47 g/mol), one of the major steroid hormones, is a key factor in the synthesis of protein. Its profound effect on the reduction of inflammation explains its use in the treatment of rheumatoid arthritis. Cortisol is 69.6% C, 8.34% H, and 22.1% 0. What is its empirical and molecular formula? 5. A 50.51 g sample of a compound made from phosphorus and chlorine is decomposed. Analysis of the products showed that 11.39 g of phosphorus atoms were produced. What is the empirical formula of the compound? 6. When 2.5000 g of an oxide of mercury (HgxOy) is decomposed into the elements by heating, 2.405 g of mercury are produced. Calculate the empirical formula. 7. A component of protein called serine has an approximate molar mass of 100 g/mole. If the percent composition is as follows, what is the empirical and molecular formula of serine? C=34.95% H=6.844% 0=46.56% N = 13.59%

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Chapter1: Chemical Foundations
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### Empirical and Molecular Formulas Worksheet **Unit 4 Review Worksheet #2: Empirical and Molecular Formulas** #### Directions: Please complete this on a separate piece of paper. 1. **What is the empirical formula and empirical formula mass of each of the following compounds?** - a. C₂H₄ - b. C₂H₆O₂ - c. N₂O₅ - d. Ba₃(PO₄)₂ - e. Te₄I₁₆ 2. **What is the molecular formula of each compound?** - a. Empirical Formula CH (M = 78.11 g/mol) - b. Empirical Formula C₃H₆O₂ (M = 74.08 g/mol) - c. Empirical Formula HgCl (M = 472.1 g/mol) - d. Empirical Formula C₇H₄O₂ (M = 240.20 g/mol) 3. **A chloride of silicon contains 79.1% Cl. If the molar mass is 269 g/mol, what is the empirical and molecular formula?** 4. **Cortisol (M = 362.47 g/mol), one of the major steroid hormones, is a key factor in the synthesis of protein. Its profound effect on the reduction of inflammation explains its use in the treatment of rheumatoid arthritis. Cortisol is 69.6% C, 8.34% H, and 22.1% O. What is its empirical and molecular formula?** 5. **A 50.51 g sample of a compound made from phosphorus and chlorine is decomposed. Analysis of the products showed that 11.39 g of phosphorus atoms were produced. What is the empirical formula of the compound?** 6. **When 2.5000 g of an oxide of mercury (HgₓOᵧ) is decomposed into the elements by heating, 2.405 g of mercury are produced. Calculate the empirical formula.** 7. **A component of protein called serine has an approximate molar mass of 100 g/mole. If the percent composition is as follows, what is the empirical and molecular formula of serine?** - C = 34.95% - H = 6.844% - O =
Transcribed Image Text:### Empirical and Molecular Formulas Worksheet **Unit 4 Review Worksheet #2: Empirical and Molecular Formulas** #### Directions: Please complete this on a separate piece of paper. 1. **What is the empirical formula and empirical formula mass of each of the following compounds?** - a. C₂H₄ - b. C₂H₆O₂ - c. N₂O₅ - d. Ba₃(PO₄)₂ - e. Te₄I₁₆ 2. **What is the molecular formula of each compound?** - a. Empirical Formula CH (M = 78.11 g/mol) - b. Empirical Formula C₃H₆O₂ (M = 74.08 g/mol) - c. Empirical Formula HgCl (M = 472.1 g/mol) - d. Empirical Formula C₇H₄O₂ (M = 240.20 g/mol) 3. **A chloride of silicon contains 79.1% Cl. If the molar mass is 269 g/mol, what is the empirical and molecular formula?** 4. **Cortisol (M = 362.47 g/mol), one of the major steroid hormones, is a key factor in the synthesis of protein. Its profound effect on the reduction of inflammation explains its use in the treatment of rheumatoid arthritis. Cortisol is 69.6% C, 8.34% H, and 22.1% O. What is its empirical and molecular formula?** 5. **A 50.51 g sample of a compound made from phosphorus and chlorine is decomposed. Analysis of the products showed that 11.39 g of phosphorus atoms were produced. What is the empirical formula of the compound?** 6. **When 2.5000 g of an oxide of mercury (HgₓOᵧ) is decomposed into the elements by heating, 2.405 g of mercury are produced. Calculate the empirical formula.** 7. **A component of protein called serine has an approximate molar mass of 100 g/mole. If the percent composition is as follows, what is the empirical and molecular formula of serine?** - C = 34.95% - H = 6.844% - O =
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