Find the formula weight of reactant if the formula weight of product is $54 \mathrm{u}$ and the percent atom…

Find the formula weight of reactant if the formula weight of product is $54 \mathrm{u}$ and the percent atom economy is 75 .
  1. $72 \mathrm{u}$
  2. $24 u$
  3. $30 \mathrm{u}$
  4. $80 u$

Solution

$\begin{aligned} & \% \text { atom economy }=\frac{\text { Product } w t}{\text { Reactant } w t} \times 100 \\ & 75=\frac{54}{x} \times 100 \\ & x=72 u\end{aligned}$

Asked in: MHT CET 2022 (06 Aug Shift 2)

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