Calculate the energy of a photon of red light with a wavelength of 6.45 x
10^-5 cm.*

D.na is the answer hope this

Show and image of the mixtures or write them

A.(nh4)(2co3)is the correct answer 

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.