You are a bioengineer working for a drug company. For the development of a new birth

control drug, you have to calculate some dosage values based upon the molecular weight of one of the

main ingredients: the hormone Estrogen. Estrogen has the chemical formula: C$20$H$24$O$2$

A$)$ Calculate the molecular weight of Estrogen

B$)$ If the blood$/$brain barrier allows molecules of less than about $400$ g$/$mol $($Da$)$ to enter the brain,

can Estrogen enter the brain if ingested orally?

C$)$ If the dose of Estrogen is $0\mathrm{.}044$ mg for a woman weighing $80$ kg$,$ what is the dose for a woman

weighing $76$ kg$?$

D$)$ For the lighter of the $2$ women, how many moles of Estrogen would be in her dose?

E$)$ For the same woman, how many molecules of estrogen would be in her dose? Avogadro$$s

number is $6\mathrm{.}023$ x $1023$ molecules.