UV-B radiation is in the 285-315 nm region on the spectrum. Calculate the energy (in kJ/mol) of the 288 photon that is associated with skin cancer.

What are the genotypic and phenotypic ratios

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.