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[DOC File]Chapter 13 worksheet #1
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mass fraction and mass (or weight) percent (%) mass fraction = mass of component / total mass of soln. mass % = mass fraction x 100. parts per million/billion/trillion (ppm/ppb/ppt) ppm = (mass fraction) x 106. ppb = (mass fraction) x 109. ppt = (mass fraction) x 1012. Used for very dilute solutions (for example pollutants in drinking water).
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[DOC File]Mole Conversions Worksheet
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Mole Conversions Worksheet. There are three mole equalities. They are: 1 mol = 6.02 x 1023 particles. 1 mol = g-formula-mass (periodic table) 1 mol = 22.4 L for a gas at STP
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[DOC File]Stoichiometry Worksheet 1 (Mole-Mole Conversions)
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Percent yield is calculated to be the experimental yield divided by theoretical . yield multiplied by 100%. (Mole-Mole Conversions) The combustion of the organic fuel, decane, is outlined in the chemical equation below. You must balance the equation in order to answer the subsequent questions a-c. __2__C10H22 + _31_O2 __20__CO2 + __22__H2O. a.
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[DOC File]Molar Mass Percent Composition
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Percent Composition Worksheet . Calculate the percentage composition of each of the following compounds. Show your work and always include units (Show the answer from calculator first, then round the answers to 2 decimal places). 1. Ca3P2 (66.0% Ca, 34.0% P) % Ca = 120.24 x 100% % P = 61.94_ x 100% . 182.15 182.15
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[DOC File]Empirical and Molecular Formula Worksheet
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13) An unknown compound was found to have a percent composition as follows: 47.0 % potassium, 14.5 % carbon, and 38.5 % oxygen. What is its empirical formula? If the true molar mass of the compound is 166.22 g/mol, what is its molecular formula? K2C2O4
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[DOC File]Molar Mass Percent Composition
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Chemistry: Molar Mass and Percentage Composition KEY. Calculate the molar masses and percentage composition of each of the following compounds. Show your work and always include units. 1. Ca3P2. 2. Ca(OH) 2. 3. Na2SO4. 4. CaSO4. 5. (NH4) 2SO4. 6. Zn3(PO4) 2. 7. Mg(NO2) 2. 8. KCl
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[DOC File]Percent Composition and Empirical Formula
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In order to find the molecular formula of a compound whose empirical formula is known, the molar or molecular mass of the compound must be known. In this experiment, the percent composition and empirical formula of magnesium oxide, the main compound that is formed when magnesium metal combines with oxygen in air, will be determined.
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[DOC File]Mole Conversion Worksheet
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Step 5: Cancel the label, then punch the numbers in on your calculator. Example: You are massing a 24 K gold chain, and find that it weighs 400 grams. Determine how many moles of Gold atoms you have. Steps 1: Obviously, you are solving for moles. Step 2: Looking at the periodic table, you find that gold weighs 197 AMU, or 197 grams per mole.
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[DOC File]Molar Mass - jdenuno
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Title: Molar Mass . Purpose: To determine the molar mass of a compound. Materials: 0.1 M potassium hydroxide, KOH. potassium hydrogen phthalate (KHP), KHC8H4O4. phenolphthalein test paper. distilled water 15 mL beaker. 150 mL beaker. graduated pipet. 1.0 mL measuring spoon. 10.0 mL graduated cylinder Procedure: Calibrate a dropping bottle
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[DOC File]Percent Composition Worksheet
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Percent Composition Worksheet. Calculate the molar mass for the following compounds. SiF4 KOH. Calculate the percent composition of carbon for the following compounds. CaCO3 CH4. Sn(CO3)2. Calculate the percent composition of nitrogen for the following compounds. N2O. Sr(NO3)2. NH4NO3. Calculate the percent composition for each element in ...
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