If density of mercury is 13600 kg/ m = 9.8 m/s?. Find the energy of translation 3 and g %3D per cubic metre of oxygen at N.T.P.
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- The first five energy levels of the hydrogen atom are at −13.6 eV, −3.4 eV,−1.51 eV, −0.85 eV, and -0.54 eV. The absorption spectrum of a hydrogen plasma is acontinuous spectrum with dark lines corresponding to all the possible transitions betweenthese five levels. Sketch the spectrum you would expect to see at wavelengths from 400 nmto 700 nm. You do not need to use colour in your sketch, but you should provide an x-axiswith tickmarks and labels in nm, label the approximate red, green and blue regions, andlabel each dark line with its wavelength. Show your calculations of the wavelengths. (Hint:you should show three dark lines.)The intensity of blackbody radiation peaks at a wavelength of 583 nm. (a) What is the temperature (in K) of the radiation source? (Give your answer to at least 3 significant figures.) K (b) Determine the power radiated per unit area (in W/m2) of the radiation source at this temperature. W/m?A square metal plate with a side 0.4m is heated to a temperature of 2000k by passing a current through it. Assuming that it behaves like a blackbody, how much power does the plate radiate under these conditions?
- The first five energy levels of the hydrogen atom are at −13.6 eV, −3.4 eV, −1.51 eV, −0.85 eV, and −0.85 eV. The absorption spectrum of a hydrogen plasma is a continuous spectrum with dark lines corresponding to all the possible transitions between these five levels. Sketch the spectrum you would expect to see at wavelengths from 400 nm to 700 nm. You do not need to use colour in your sketch, but you should provide an x-axis with tickmarks and labels in nm, label the approximate red, green and blue regions, and label each dark line with its wavelength. Show your calculations of the wavelengths. (Hint: you should show three dark lines.)What is the longest - wavelength line in nanometers in the infrared series for hydrogen where m = 3?Rose bengal is a chromophore used in biological staining that has an absorption maximum at 559.1 nm and several other shorter wavelength absorption bands in the ultraviolet and visible regions of the spectrum when dissolved in ethanol. What is the energy difference, in kilojoules per mole, between the absorption maximum at 559.1 nm and a band at 221.5 nm? E = kJ/mol