Assignment 29. What is the half-life of a 100.0 g sample of nitrogen-16 that decays to 12.5 g in 21.6 s? 30. Gold-198 has a half life of 2.6 days. How much of a 50. g sample of gold-198 would remain after 7.0 days? 31. A moon rock has 3% of its original aluminum-26. If aluminum-26 has a half life of 720 000 years, what is the approximate age of the moon rock?Assignment 32. Write the nuclear reaction equation curium-248 undergoing alpha decay. 33. Write the nuclear reaction equation for sulfur35 undergoing beta negative decay. 34. Write the nuclear reaction equation for sodium-22 undergoing beta positive decay. 35. Write the nuclear reaction equation for potassium-40 undergoing electron capture. 36. Determine the energy equivalent, in joules, of a proton. 37. The mass of helium-4 is 4.002 603. Determine the binding energy, in joules, of helium-4