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18 Nov 2019
Name: Due 10/10/2017 1. Answer in scientific notation. a. 19.62 kg of H,SO, is how many moles? b. How many moles are in 51.0 mg of AgNO,? 2. How many atoms are in 5.7 grams of F2? What is the mass in grams of 1.5 x 1022 molecules of H20? 3. How many millimoles of aluminum atoms are in 1.89 x 10-2 g AI? 2.57 nanograms of Ss would contain how many sulfur atoms? 4. 5. A magnesium ribbon of uniform width and thickness has a mass of 0.750 g Mg/meter. How many magnesium atoms are in 5.25 cm of the ribbon? 6. A sample of an alcohol is found to have 52.2% carbon, 13.1% hydrogen, and 34.8% oxygen, by mass. What is the empirical formula of the alcohol? A sample of a pure compound is composed of 15.8% aluminum, 28.0% sulfur, and 62% oxygen. Find the empirical formula for this compound.
Name: Due 10/10/2017 1. Answer in scientific notation. a. 19.62 kg of H,SO, is how many moles? b. How many moles are in 51.0 mg of AgNO,? 2. How many atoms are in 5.7 grams of F2? What is the mass in grams of 1.5 x 1022 molecules of H20? 3. How many millimoles of aluminum atoms are in 1.89 x 10-2 g AI? 2.57 nanograms of Ss would contain how many sulfur atoms? 4. 5. A magnesium ribbon of uniform width and thickness has a mass of 0.750 g Mg/meter. How many magnesium atoms are in 5.25 cm of the ribbon? 6. A sample of an alcohol is found to have 52.2% carbon, 13.1% hydrogen, and 34.8% oxygen, by mass. What is the empirical formula of the alcohol? A sample of a pure compound is composed of 15.8% aluminum, 28.0% sulfur, and 62% oxygen. Find the empirical formula for this compound.
Keith LeannonLv2
27 Apr 2019