Calculate the number of photons having a wavelength of 375nm required to produce 1000. J of energy. A. 2.48e-28
B. 1.89e27
C. 2.84e63
D. 1.89e21

How many moles of gas are present if p=11 atm, v=12l, t=185k?

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Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?