The best wavelengths of visible light for photosynthes's fall within the blue range (425-450 nanometers) and red range (600-700 nanometers). Calculate the frequency of a blue licht a wavelength of 4.30 x 10 meters
129 H7
1.43 x10-15 HZ
6.93 × 1014 Hz
6,98 HZ
143 hz

Use examples from the article to explain one positive and one negative effect that chemistry has had on society

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

Consider the following multistep reaction: a b→ab(slow) a ab→a2b(fast)−−−−−−−−−−−−−−−−− 2a b→a2b(overall) based on this mechanism, determine the rate law for the overall reaction. express your answer in standard masteringchemistry format. for example, if the rate law is k[a]3[b]2 type k*[a]^3*[b]^2