alleryStart learning →How is the atom economy of a synthesis defined?
AActual product mass over predicted product mass
BMoles of product over moles of limiting reactant
CProduct mass over the mass of all reactants used
DWaste mass over the total mass of product formed
Answer & Solution
Correct answer: C. Product mass over the mass of all reactants used
1. Atom economy is one measure used in green chemistry.
2. It compares the mass of the final product with the combined mass of all reactants used.
3. Expressed as a percentage, it shows how much of the input ends up in the product.
4. Percent yield is the different measure that compares actual product with predicted product.
5. The original ibuprofen route needed 514 g of reactants per 206 g of product, an atom economy of 40%.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 4 "Stoichiometry of Chemical Reactions", section 4.4 Reaction Yields_
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