When 3-bromocyclopentene is treated with hbr, the observed product is a racemic mixture of trans-1,2-dibromocyclopentane. none of the corresponding cis-dibromide is observed. propose a mechanism that accounts for the observed stereochemical outcome:

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?

An atomic nucleus is composed ofa)protons.b)protons and neutrons.c)protons and electrons.d)protons, neutrons, and electrons.