Problem: Silicon carbide (SiC) is made by heating sand (silicon dioxide) with carbon. Carbon monoxide is also formed. From 100.0 kg sand, 51.4 kg SiC are formed. What is the percent yield of SiC?
46
Plan: Given the actual yield of SiC, need its theoretical yield to be able to calculate its percent yield. Steps:
-Write the balanced equation, convert mass of SiO 2 to mol, find the mol of SiC from the molar ratio, and convert mol of SiC to mass to obtain the theoretical yield and the percent yield.
Convert the mass of SiO 2 to moles:
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