Consider the reaction between CH3CHO(l) and O2(g) to form CO2(g) and H2O(l). If the percent yield of CO2(g) is 56.0% and 18.0 grams of CO2(g) forms, determine the theoretical yield of CO2(g) in moles.
Given:
Percent yield = 56.0 %
Actual yield = 18.0 g
Use:
Percent yield = actual yield * 100 / theoretical yield
56.0 = 18.0 * 100 / theoretical yield
theoretical yield = 32.14 g
Molar mass of CO2,
MM = 1*MM(C) + 2*MM(O)
= 1*12.01 + 2*16.0
= 44.01 g/mol
mass(CO2)= 32.14 g
use:
number of mol of CO2,
n = mass of CO2/molar mass of CO2
=(32.14 g)/(44.01 g/mol)
= 0.7303 mol
Answer: 0.730 mol
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