If a mixture of 753 g of phosphorus and 387 g of oxygen produce 433 g of

If a mixture of 753 g of phosphorus and 387 g of

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Tetraphosphorus hexoxide is formed by the reaction of phosphorus with oxygen gas. If a mixture of 75.3 g of phosphorus and 38.7 g of oxygen produce 43.3 g of tetraphosphorous hexoxide, what is the percent yield for the reaction? (Please show all steps and methods). * This review was not prepared by your professor or school and is neither approved nor endorsed by your college or university 22
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ECU - GENERAL CHEMISTRY I - PROF. SPUCHES ECU CHEM 1150 SPUCHES EXAM 2 REVIEW* PRACTICE: The fizz produced when an Alka-Seltzer tablet is dissolved in water is due to the reaction between sodium bicarbonate and citric acid, C 6 H 8 O 7 : 3NaHCO 3 (aq) + C 6 H 8 O 7 (aq) 3CO 2 (g) + 3H 2 O (l) + Na 3 C 6 H 5 O 7 (aq) If 1.00 g of sodium bicarbonate and 1.00 g of citric acid are allowed to react, what is the limiting reagent? How many grams of carbon dioxide can theoretically form? How much of the excess reagent is left over after the reaction has come to completion? If you perform the experiment with an actual yield of 0.49 g, what is your percent yield for the reaction? * This review was not prepared by your professor or school and is neither approved nor endorsed by your college or university 23
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ECU - GENERAL CHEMISTRY I - PROF. SPUCHES ECU CHEM 1150 SPUCHES EXAM 2 REVIEW* PRACTICE: Determine the percent yield of a reaction that produces 28.65 g of Fe when 50.00 g of Fe 2 O 3 react with excess Al according to the following reaction. (Molar masses: Fe = 55.85 g/mol, O = 16.00 g/mol, Fe 2 O 3 = 159.70 g/mol) Fe 2 O 3 (s) + 2 Al(s) Al 2 O 3 (s) + 2 Fe(s) A) 61.03 % B) 28.65 % C) 57.30 % D) 20.02 % E) 81.93 % SUMMARY: Molarity * This review was not prepared by your professor or school and is neither approved nor endorsed by your college or university 24
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ECU - GENERAL CHEMISTRY I - PROF. SPUCHES ECU CHEM 1150 SPUCHES EXAM 2 REVIEW* PRACTICE: Calculate the molarity of each of the following solutions. a. 0.41 mol of LiNO 3 in 6.26 L of solution b. 72.9 g C 2 H 6 O in 2.35 L of solution c. 12.21 mg KI in 107.6 mL of solution PRACTICE: The molecular weight of ethanol (C 2 H 5 OH) is 46.1 and the density of absolute (100%) ethanol = 0.79 g/mL a) Calculate the molarity of absolute ethanol (100% ethanol). b) Calculate the molarity of ethanol in a bottle of wine that is 14.0% ethanol by volume. * This review was not prepared by your professor or school and is neither approved nor endorsed by your college or university 25
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ECU - GENERAL CHEMISTRY I - PROF. SPUCHES ECU CHEM 1150 SPUCHES EXAM 2 REVIEW* PRACTICE: What is the molarity of an NaOH solution which contains 24.0g of NaOH dissolved in 200mL of solution? PRACTICE: Determine the molarity of a solution formed by dissolving 97.7 g LiBr in enough water to yield 750.0 mL of solution. A) 1.50 M B) 1.18 M C) 0.130 M D) 0.768 M E) 2.30 M PRACTICE: 20.0 mL of a 0.10 M solution of a diprotic acid (H 2 A) are titrated with 0.20 M NaOH. How many mL of this NaOH solution are required to completely neutralize this acid solution? a. 25.0 b. 20.0 c. 15.0 d. 10.0 e. 5.00 * This review was not prepared by your professor or school and is neither approved nor endorsed by your college or university 26
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ECU - GENERAL CHEMISTRY I - PROF. SPUCHES ECU CHEM 1150 SPUCHES EXAM 2 REVIEW* PRACTICE: Solid calcium bicarbonate (Ca(HCO 3 ) 2 ) reacts with aqueous hydrochloric acid (HCl) to form aqueous calcium chloride, liquid water, and carbon dioxide gas.
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