Consider a molecule A that has 3 chiral centers. How many diastereomers exist for A? think carefully. 

62. Give a brief description of the following: A.  Epitope B.  Lysogeny

Identify the writer of the following work: “I’m Nobody, Who are you?”

The departed lover of the narrator in “The Raven” is: 

Identify the writer of the following work: “Annabel Lee”

Born into slavery in 1797 in upstate New York, and living all the way through the Civil War era to 1883, this woman would rise to become one of “the nation’s most flamboyant advocates of the rights of African-Americans and women.”

Olaudah Equiano’s The Narrative of the Interesting Life of Olaudah Equiano found an enthusiastic American audience even though it depicted the inhumanity of slavery in a time of legal American slavery.

Which members of a truss are typically in tension when a gravity load is applied?

What is a common structural challenge when using trusses?

What is a common section used for tensile members in cross bracing?