A compound is found to contain 36.5% Na, 25.4% S, and 38.1% O. 7. Chemistry: Percentage Composition and Empirical & Molecular Formula. NOTE: If you are given mass, you do not need to do this step. 2. 5) X 39 Y 13 X 2 Y. 8. What is the percent composition of SO 2? Determine the empirical formula from the percent composition for each of the following: a) 92.24 % C; 7.76 % H => CH b) 36.48 % Na; 25.44 % S; 38.08 % O => Na 2 SO 3 Find the empirical formula of a compound that is 53.7% iron and 46.3% sulfur. _____ 4. Write the empirical formula for the following compounds. âSTEP 3: Convert the masses to the number of moles of each element. 6) A compound with an empirical formula of C 2 OH 4 and a molar mass of 88 grams per mole. An oxide of chromium is found to have the following % composition: 68.4% Cr and 31.6% O. Empirical and Molecular Formula Worksheet . Name Date Pd Empirical Formulas Worksheet, #1 Directions: Find the empirical formula and name for each of the following. 6. âSTEP 2: If you are given % composition, turn it into grams by assuming a 100.0 g sample. How to calculate an empirical formula â¢ Whatâs the empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and 29.0% oxygen? Ch 9 - Empirical Formula from Percent Composition Worksheet 1. CH . 1) C 6 H 6. Whatâs the empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and 29.0% oxygen? A compound with an empirical formula of CFBrO and a molar mass of 254.7 grams per mole. EMPIRICAL FORMULA WORKSHEET. 1. 2. Rubbing alcohol was found to contain 60.0% carbon, 13.4% hydrogen, and the remaining mass was due to oxygen. Worksheet # C43: Percent Composition, Empirical Formulas, and Molecular Formulas 1. A compound is 24.7% Calcium, â¦ Determine the empirical formula of a compound that is 52.11% carbon, 13.14% hydrogen, and 34.75% oxygen. State the empirical formula for each of the following compounds: a) C 4H8; b) C 2H6O2; c) N2O5; d) Ba 3(PO 4)2; e) Te 4I16 2. 2) C 8 H 18 C 4 H 9 . What is the empirical formula of rubbing alcohol? What is the empirical formula for a compound that contains 0.063 mol chlorine and 0.22 mol masses or percent composition. C = 34.95 % H= 6.844 % O = 46.56 % N= 13.59 % Percent Composition and Molecular Formula Worksheet Key. Worksheet #8 Empirical Formulas 1. Solve the following problems. A compound with an empirical formula of C 2 H 8 N and a molar mass of 46 grams per mole. (FeSO3) Find the empirical formula for a compound which contains 32.8% chromium and 67.2% chlorine. In this compounds activity, students determine the empirical formulas and percent compositions of compounds given chemical formulas, mass of elements in â¦ A compound with an empirical formula of C 4 H 4 O and a molar mass of 136 grams per mole. Some of the worksheets for this concept are Work 8 empirical formulas h o n o 4i, Formula work, , Percent composition work ii, Percent composition and molecular formula work, Percent composition and molecular formula work, Empirical formula work, Empirical formulas work 1. This WS 4.5 Percent Composition and Empirical Formula Worksheet is suitable for 10th - 12th Grade. C 3 H 3 O mass = 55 g/mole 2. C3H3O mass = 55 g/mole SHOW WORK ON A SEPARATE SHEET OF PAPER. Find its empirical formula. Percent Composition and Molecular Formula Worksheet Key 1. 3) WO 2 WO 2 . If the percent composition is as follows, what is the empirical and molecular formula of serine? If the molar mass of the compound in problem 1 is 110 grams/mole, whatâs the molecular formula? 4) C 2 H 6 O 2 CH 3 O . What is the empirical formula for a compound which contains 0.0134 g of iron, 0.00769 g of sulfur and 0.0115 g of oxygen? 1. 3. (CrCl3) Answer the following questions: 9. Empirical Formulas Percent Composition Answer Sheet - Displaying top 8 worksheets found for this concept.. Show your work, and always include units where needed. C 6 â¦