Selected Answers Part II to Mols and Stoichiometry Worksheet Empirical Formula: Find the empirical formulas for the following compounds. Find the empirical Formula for a compound that contains 32.8% chromium, and 67.2% chlorine. Cr = Ratio approx. 1:3 therefore Empirical Formula→ CrCl3 Cl = The compound benzamide has the following composition. What is the empirical formula? C=69.40% H=5.825% O=13.21% N=11.57% C = 7 H = = 7 Therefore Empirical Formula C7H7ON → O = =1 N = = 1 What is the empirical formula for a compound which contains 0.0134 g of iron, 0.00769g of sulfur and 0.0115g of oxygen? Fe = =1 S = =1 Therefore empirical formula FeSO3 → O== 3 Empirical Formulas and hydrates: A chemist has a sample of hydrated Li2SiF6 and it weighs 0.4813 grams. He heats it strongly to drive off the water of hydration, and after heating, he found that the anhydrous compound has a mass of 0.391 grams. Find the formula of the hydrate.
Selected Answers Part II to Mols and Stoichiometry Worksheet Empirical Formula: Find the empirical formulas for the following compounds. Find the empirical Formula for a compound that contains 32.8% chromium, and 67.2% chlorine. Cr = Ratio approx. 1:3 therefore Empirical Formula→ CrCl3 Cl = The compound benzamide has the following composition. What is the empirical formula? C=69.40% H=5.825% O=13.21% N=11.57% C = 7 H = = 7 Therefore Empirical Formula → C7H7ON O = =1 N = = 1 What is the empirical formula for a compound which contains 0.0134 g of iron, 0.00769g of sulfur and 0.0115g of oxygen? Fe = =1 S = =1 Therefore empirical formula → FeSO3 O== 3 Empirical Formulas and hydrates: A chemist has a sample of hydrated Li2SiF6 and it weighs 0.4813 grams. He heats it strongly to drive off the water of hydration, and after heating, he found that the anhydrous compound has a mass of 0.391 grams. Find the formula of the hydrate.
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