Limiting Reagents - First we compute the number of moles of...

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Limiting Reagents Limiting Reagent  is the reagent that limits the amount of products that can be  formed. For example, nitrogen gas is prepared by passing ammonia gas over solid copper(II)  oxide at high temperatures. The other products are solid copper and water vapor. 2 NH 3 (g) + 3 CuO(s)   N 2 (g) + 3 Cu(s) + 3 H 2 O(g) If 18.1 g of NH 3  are reacted with 90.4 g of CuO, which is the limiting reagent? How  many grams of N 2  will be formed?
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Unformatted text preview: First we compute the number of moles of NH 3 (M.W. = 17.031 g/mole) and the number of moles of CuO (M.W. = 79.5 g/mole). To determine which reagent is limiting we use the mole ratio from the chemical equation to convert moles NH 3 to moles CuO. So, only 1.14 moles of CuO is available, therefore CuO is the limiting reagent. That is, CuOwill run out before the NH 3 does. The mass of N 2 produced will be...
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This note was uploaded on 11/22/2011 for the course CHEMISTRY CHM1025 taught by Professor Laurachoudry during the Fall '10 term at Broward College.

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Limiting Reagents - First we compute the number of moles of...

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