Be sure to answer all parts. enter your answers in scientific notation. the following values are the only allowable energy levels of a hypothetical one-electron atom: e6 = −2.0 × 10−19 j e5 = −7.0 × 10−19 j e4 = −11.0 × 10−19 j e3 = −15.0 × 10−19 j e2 = −17.0 × 10−19 j e1 = −20.0 × 10−19 j (a) if the electron were in the n = 4 level, what would be the highest frequency (and minimum wavelength) of radiation that could be emitted?

Calculate the ph of a .10m nh4cl solution. the kb value for nh3 is 1.8×10^-5

Which of the following characteristics are true of enzymes? check all that apply. a.)the structure of an enzyme can change if conditions change. b.)a single enzyme can normally catalyze a wide variety of reactions under many conditions. c.)enzymes are found only in nonliving systems. d.)enzymes allow living things to regulate body conditions through feedback mechanisms. e.)enzymes bind to specific substrates in specific ways. f.)enzymes increase the rate of reaction. g.)when shown in energy-reaction diagrams, enzymes represent the higher activation energy.

How is the electron sea model of metallic bonding different from the band theory? how are they the same? give at least one similarity and one difference between the models