Most of the ultraviolet radiation reaching the surface of the earth is UV-A radiation, which has a wavelength range of 315 nm to 400 nm. UV-A radiation is a cause of skin aging and also contributes to development of skin cancer. Determine the energy of a mole of photons of UV-A radiation that have a wavelength of 325 nm.
Answers: 2
Chemistry, 22.06.2019 16:00
The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride
Answers: 1
Chemistry, 22.06.2019 21:00
The rate constant for the reaction below is 6.2 x 10−5 mol l−1 s −1. if the initial concentration of a is 0.0500 m, what is its concentration after 115 s?
Answers: 1
Chemistry, 23.06.2019 00:00
Which is true about metals used for jewelry, such as platinum and gold? a. they have low flammability. b. they have low reactivity. c. they have high flammability. d. they have high reactivity.
Answers: 1
Most of the ultraviolet radiation reaching the surface of the earth is UV-A radiation, which has a w...
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