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.

When the earth was formed and cooled, why did nickel and iron end up in the center of the earth while basalt and granite ended up in the outer layers

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o