Calculate the percent atom economy when a product of formula weight $175 \mathrm{u}$ is obtained in a…
Calculate the percent atom economy when a product of formula weight $175 \mathrm{u}$ is obtained in a chemical reaction using $225 \mathrm{u}$ formula weight reactant.
$70.1 \%$
$77.7 \%$
$90.5 \%$
$95.0 \%$
Solution
$\%$ atom economy
$\begin{aligned}
& =\frac{\text { Formula weight of the desired product }}{\text { Sum of formula weight of all the reactants }} \times 100 \\
& \text { used in the reaction } \\
& =\frac{175 \mathrm{u}}{225 \mathrm{u}} \times 100 \\
& =77.7 \%
\end{aligned}$