Calculate the energy released in the following nuclear fission reaction: 239Pu+n→98Tc+138Sb+4n239Pu+n→98Tc+138Sb+4n Recall that the atomic masses are 239 Pu239 Pu = 239.052157 u u, 98 Tc 98Tc = 97.907215 uu, 138 Sb 138Sb = 137.940793u

[Review Topics] [References] Radioactive vanadium-48 decays with a half-life of 16.0 days. a. What is the value of k in s12 k = b. A sample contains 58.0 mg 48 t° V. How many decay events will be produced in the first second? Assume the atomic mass of 48 V is 48.0 u. decays/s c. A chemist obtains a fresh sample of 8V and measures its radioactivity. She then determines that to do an experiment, the radioactivity cannot fall below 25% of the initial measured value. How long does she have to do the experiment? days Submit Answer Retry Entire Group 4 more group attempts remaining

2. A neutron causes 223Fr to change according to the following reaction: n +22³Fr →AX+y 87 87 The X nucleus subsequently undergoes - decay, and its daughter does too. What is the atomic mass number of the final nucleus? 60 ssf602 ssf60 ss. 60 ssf60% Ossi ssf60 ss f60 ssf60

The ceramic glaze on a red-orange Fiestaware plate is U2O3 and contains 50.0 grams of 238U , but very little 235U. Calculate the total energy that will be released by the 238U decay.