Astudent wanted to synthesize 4-(5-methylhex-3-yn-1-yl)phenol. the student\'s key step was to be the sn2 reaction of an acetylide with 4-(2-bromoethyl)phenol. however, the student isolated none of the desired product. what went wrong? draw the two products the student isolated instead. assume a 1: 1 mixture of reagents.

Modern weaponry has increased the number of deaths in wars and violent conflicts.

If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?

1) describe the physical layout of the ocean floor ? 2) explain how the dumbo octopus swims differently than other octopus species and why this would be an advantage in the aphonic zone . 3) why are the types of organisms that live at each underwater hot vent so dramatically different ?