Please help me on part B ± Core Chemistry skill: Calculating Moles of Product fr
ID: 560241 • Letter: P
Question
Please help me on part B
± Core Chemistry skill: Calculating Moles of Product from a Limiting Reactant What is the theoretical yield of aluminum oxide if 1.80 mol of aluminum metal is exposed to 1.65 mol of oxygen? Express your answer with the appropriate units When exposed to air, aluminum metal, Al, reacts with oxygen, O2, to produce a protective coating of aluminum oxide, Al2 O3, which prevents the aluminum from rusting underneath. The balanced reaction is shown here Hints 0.900 mol Submit My Answers Give Up 4A1+ 3O22A1203 Correct A theoretical yield is equivalent to a percent yield of 100%. In practice, it is very rare to achieve 100% yield from a reaction due to a wide range of outside factors Part B In Part A, we saw that the theoretical yield of aluminum oxide is 0.900 mol. Calculate the percent yield if the actual yield of aluminum oxide is 0.621 mol Express your answer with the appropriate units Hints Value UnitsExplanation / Answer
Part B
The formula for percent yield is
% yield =( actual yield /theoretical yield)×100
= (0.621mol/0.900mol)×100
= 69%