A solution was formed by combining 25.0 g of solid A with 60.0 mL of distilled water, with the water initially at 21.4oC. The final temperature of the solution was 25.3oC Calculate the heat released as the solid dissolved, qsoln, assuming no heat loss to the calorimeter.

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?