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A photon has a wavelength of 293 nm. Calculate the energy of the photon in joules. Enter your answer in scientific notation.? Estimate the wavelength (in nm) of such a proton moving at 2.95 × 108 m/s (mass of a proton = 1.673 × 10−27 kg).? Arrange the compounds in order of decreasing magnitude of lattice energy: LiBr, KI, and CaO.? Find the perimeter of the triangle defined by the coordinates (7, 1), (-6, 1), and (10, 6). (Round to nearest tenth)? The ratio of corres ponding sides of similar triangles is 14:15 what is the ratio of the perimeters?