You needed to make sure your glassware was dry before proceeding with the hydroboration reaction and an excess of hydroborane was used to counter the small amounts of water present in the reaction. why is the borane-thf reagent so reactive with water? hint: what is the electronegativity of b compared to h?

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?

Which of the following are sources of revenue for media companies? a. direct sales to producers b.advertising and subscriptions c. online purchase d. capital investments

How many moles of oxygen react with 12 moles of aluminum