How does deforestation affect the carbon cycle?

There are main groups in the modern periodic table of elements

How many moles of air are there in a human lung with a volume of 2.4 l at stp? 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?