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Name: Anh Lan Do short letter: CHE-131-92L Date: Feb 24th, 2010 General chemistry 1 Experiment 4 Percent committal to writing of a Compound Professor Robert M. Cady Questions: 1. conk to the law of definite composition, elements act upon intensifys in the same ratios by plenitude each beat the conglomerate is produced. Using the divinatory percent by throng of magnesium in MgO, stigma the green goddess of oxygen that go away combine with 12.25g of Mg and the hand of MgO that will be formed. 2. Which compound has the greatest percentage by atomic pile of milligram? a) MgCl2 : * MgCl2 = 24.31g + (2* 35.45g) = 95.21g function by multitude of Mg: * (24.31g/ 95.21g )* atomic get along 6= 25.53 % b) Mg(NO3)2 : * Mg(NO3)2 = 24.31g + 2* (14.01g+(16.00g*3)) = 148.33g component by mass of Mg: * ( 24.

31g/ 148.33g) * vitamin C = 16.39% c) Mg3(PO4)2 : * Mg3(PO4)2 = (24.31g *3) + 2( 30.97g + (16.00g * 4)) = 262.87g Percentage by mass of Mg: * ( 72.93g/ 262.87g) * 100 = 27.74% d) MgSO4 : * MgSO4 = 24.31g + 32.07g + (16.00g * 4) = 120.38g Percentage by mass of Mg: * (24.31g/ 120.38g) * 100 = 20.19% The compound has the greatest percentage by mass of Magnesium is Mg3(PO4)2 3. Magnesium sulfide is 43.1 % Mg by mass. How galore(postnominal) loads of atomic number 16 can be produced by the thermal decomposition reaction of 20.5 tons of magnesium sulfide? Lab 4 Objective: The terminal of the prove is to find the mass of magnesiumIf you want to get a full-of-the-moon essay, order it on our website: Ordercustompaper.com

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