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Please help with a and b. Please explain which formula to use step by step. 10. An ultraviolet photon, =584A,A= angstrom unit, is absorbed by

Please help with a and b. Please explain which formula to use step by step.
10. An ultraviolet photon, =584A,A= angstrom unit, is absorbed by a hydrogen molecule at rest. Since momentum is conserved a. What is the velocity of the hydrogen molecule after absorbing the photon? b. What is the translational energy of the hydrogen molecule in J/mol ? Ans. 0.012J/mol

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