The Molecular and Empirical Formula Game

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Empirical and Molecular Formulas

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Presentation transcript:

The Molecular and Empirical Formula Game Can you find the molecular or empirical formula?

Question 1 A compound has an empirical formula of ClCH2 and its molar mass is 98.96 g/mol. What is the molecular formula of this compound? Cl2C2H4

Question 2 A compound consists of 75.0% magnesium and 25.0% oxygen. What is the empirical formula? Mg2O

Question 3 A compound has the following percent composition: 49.48% carbon, 5.19% hydrogen, 16.48% oxygen, and 28.85% nitrogen. What is the empirical formula? C4H5ON2

Question 4 C4H5ON2 has a molar mass of 194.19 g/mol. What is its molecular formula C8H10O2N4

Question 5 A compound is found to have 46.67% nitrogen, 6.70% hydrogen, 19.98% carbon, and 26.65% oxygen. What is its empirical formula? N2H4CO

Question 6 Find the empirical formula of a compound that contains 15.8 g of Al, 28.1 g of S, and 56.1 g of oxygen. Al2S3O12 or Al2(SO4)3

Question 7 Benzoic acid contains 68.8% carbon, 4.95% hydrogen, and 26.25% oxygen. Find the empirical formula C7H6O2

Question 8 Benzoic acid contains 68.8% carbon, 4.95% hydrogen, and 26.25% oxygen. Find the empirical formula C7H6O2

Question 9 A compound contains 50.0% magnesium, 24.0% carbon, 16.0% oxygen, and 10.0% hydrogen. What is the empirical formula? Mg2C2OH10

Question 10 A compound contains 75.46% carbon, 4.43% hydrogen, and 20.11% oxygen. It has a molar mass of 318.31 g/mol. What is the empirical and molecular formula? EF: C10H7O2 MF: C20H14O4

Question 12 Freons are gaseous compounds used in refrigeration. A particular Freon contains 9.93% carbon, 58.64% chlorine, and 31.43% fluorine. What is the empirical formula CCl2F2

Question 12 A compound with an empirical formula of CH is found to have a molar mass of 26.04 g/mol. What is its molecular formula? C2H2

Question 13 A compound consists of 40.0% calcium, 12.0% carbon, and 48.0% oxygen. What is the empirical formula? CaCO3

Question 14 The empirical formula for a hydrocarbon is CH2. Its actual molar mass is 294 g/mol. What is its molecular formula? C21H42

Question 15 A compound consists of 85.0% silver and 15.0% fluorine. What is the empirical formula? AgF