Hot lead with a mass of 200.0 g of (Specific heat of Pb = 0.129 J/g˚C) at 176.4˚C was dropped into a calorimeter containing an unknown volume of water. The temperature of the water increased from 21.7˚C to 56.4˚C. What volume of water is in the calorimeter?

Someone, part 1: which compound does c represent? part 2: name a process that could release this compound into the air. part 3: explain how the elements that form it are conserved during the carbon cycle. use complete sentences to explain your answer. justify how this compound was created from a recycling of carbon in the carbon cycle. use complete sentences to explain your answer.

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?

Who discovered a pattern to the elements in 1869?