When a mixture of 12.5 g of acetylene (C2H2) and 12.5 g of oxygen gas is ignited

Question

When a mixture of 12.5 g of acetylene (C2H2) and 12.5 g of oxygen gas is ignited, the resultant combustion reaction produces carbon dioxide and water. What is the limiting reactant? Express your answer as a chemical formula How many grams of C2H2 are present after the reaction is complete? How many grams of oxygen gas are present after the reaction is complete? How many grams of carbon dioxide are present after the reaction is complete? How many grams of water are present after the reaction is complete? Metallic aluminum reacts with manganese(IV) oxide at elevated temperatures tc form manganese metal and aluminum oxide. A mixture of the two reactants is 67.2% mole percent aluminum. Find the theoretical yield (in grams) of manganese from the reaction of 150.0 g of this mixture. The fat stored in the hump of a camel is a source of both energy and water. Calculate the mass of water produced by metabolism of 1.2kg of fat, assuming the fat consists entirely of tristearin (C57H110O6), a typical animal fat, and assuming that during metapolism, tristearin reacts with oxygen gas to form only carbon dioxide and water. The reaction of NH3 and oxyger gas forms nitrogen monoxide and water. The nitrogen monoxide can be used to convert P4 to tetraphosphorus hexoxide, forming nitrogen gas in the process. The tetraphosphorus hexoxide can be treated with water to form phosphorous acid, which forms PH3 and phosphoric acid when heated. Find the mass of PH3 that forms from the reaction of 1 65g NH3. Express your answer with the appropriate units. A solution is prepared by mixing 0.10L of 0.14M potassium chloride with 0.25L of a 0 19M barium chloride. What volume of a 0.22M silver nitrate solution is required to precipitate all of the chloride ion in the solution as silver chloride? A 38.0mL sample of 1.00M sodium iodide and a 57.0ml sample of 0.700M sodium iodide are mixed. The solution is then heated to evaporate water until the total volume is 75.0 mL What is the molarity of the sodium iodide in the final solution? When hydrocarbons are burned in a limited amount of air both carbon monoxide and carbon dioxide form due to incomplete combustion. When 0.430g of a particular hydrocarbon was burned in air. 0.446g of carbon monoxide, 0.700g of carbon dioxide, and 0.430g of water were formed. What is the emprical formula of the compound? Express your answer as a chemical formula. How many grams of oxygen gas were consumed in the incomplete combustion? How many grams would have been required for complete combustion? Titanium occurs in the magnetic mineral ilmenite (FeTiO3), which is often found mixed up with sand. The ilmenite can be separated from the sand with magnets. The titanium can then be extracted from the ilmenite by the following set of reactions: Suppose that an ilmenite-sand mixture contains 25.0% ilmenite by mass and that the first reaction is carried out with a 91.4% yield. If the second reaction is carried out with an 85.5% yield, what mass of titanium can be obtained from 1.20kg of the ilmenite-sand mixture? Some sulfuric acid is spilled on a lab bench. You can neutralize the acid by sprinkling sodium hydrogen carbonate on it and then mopping up the resultant solution. The sodium hydrogen carbonate reacts with sulfuric acid producing sodium sulfate, water, and carbon dioxide. Sodium hydrogen carbonate is added until the fizzing due to the formation of carbon dioxide stops. If 26.0mL of 6.4M sulfuric acid was spilled, what is the minimum mass of sodium hydrogen carbonate that must be added to the spill to neutralize the acid?

Explanation / Answer

C2H2 + 2.5O2 -----> 2CO2 + H2O ,12.5 gm acetylene = 12.5/26 = 0.48, 12.5 gm O2 = 12.5/32 = 0.39 moles, 0.39 moles O2 requires 0.156 mol C2H2, A) limiting reagent O2, B) C2H2 left = ( 0.48-0.156) x26 =8.424 gm, C) O2 left is 0gm, D) CO2 formed = (0.39 x 2/2.5) x44 = 13.728 gm, E) water formed = ( 0.39/2.5) x18 =2.808 gm

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