Which of the following is the correct formula to determine percent atom economy?
- A$\%$ Atom economy $=$ Formula weight of product $\times 100$
- B$\%$ Atom economy $=$ Sum of formula weight of all reactants $\times 100$
- C$\%$ Atom economy $= \frac{\text{Formula weight of desired product}}{\text{Sum of formula weight of all reactants}} \times 100$
- D$\%$ Atom economy $= \frac{\text{Sum of formula weight of all reactants}}{\text{Formula weight of desired product}} \times 100$
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