Phenobarbital is a sleep-inducing drug whose chemical formula is C12H12N2O3. It is manufactured in an eight-step process starting from toluene, C7H8. Theoretically, each molecule of toluene yields one molecule of phenobarbital. If each of the steps has a yield of 88%, what mass of toluene is needed to manufacture 25 kg of phenobarbital?

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Q: 9. Calculate the pH of a 1.25 M C₂H5NH2 solution (Kb = 5.6x104) C n H & N H ₂ + H ₂0 (1) >

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Q: Q1

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Q: (a) (b)

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".