A nucleus moving at a speed of 2.6 X 10 m/s crashes into a device that measures its kinetic energy to be 9.22 x 10-10 J. Part 1 Your answer is incorrect. What is the mass of this nucleus? mass = Hint Save for Later Last saved 50 minutes ago. Attempts: 3 of 4 used Submit Answer Saved work will be auto-submitted on the due date. Auto- submission can take up to 10 minutes. Part 2 Protons and neutrons both have a mass of about 1.7 x 10 2 kg. How many nucleons (protons plus neutrons) does this nucleus have? number of nucleons =