Question

QUESTION 37 A single atom of krypton-84 has a mass of 83.911507 amu. Determine the total binding energy for krypton-84. (mass of 'H atom=1.007825, mass of neutron = 1.008665 amu; 1 amu = 931.5 MeV) 732 Mev 0 685 MeV O 925 MeV O 7.8 x 104 Mev O 285 MeV QUESTION 38 Which of the following statements about electrochemical cells is TRUE? O In an electrolytic cell, oxidation occurs at the cathode In an electrolytic cell the anode is positive O In a voltaic cell, work is done by the surroundings O in a voltaic cell, oxidation takes place at the cathode O In a voltaic cell, electrons flow from the cathode to the anode QUESTION 39 Which of the following statements is FALSE? Click Save and Submit to save and submit. Click Save All Answers to save all answers. Save All Answe

Answer 1

Binding energy (B) = 931 Mass defect B =9314 2. MHT (A-2) MzA mer There are 36 Protons and (84-36) = 48 neutrons in the Kr. 84 nucleus. estimated mass of Kr-84 is equal to the mass of 36 Protons and 48 neutrons Mass of 36 'H-atom = 3681.00 7825, anu Mass of 48 neutrons = 48 x 1.00 8665 amu estimated mass of Kr. 84 = 84.69762 amu 1 sotopic mass 83.911 sot amu : Mass de heet (ama 0,786113 amu Men . Binding energy 931 x Ort 8 6113 - 731.87 Mer h 732 Mev (Auswer) -38: The true statements are • In an elect electrolytic cells oxidation occurs at cathode 0 In an electrolytic cell, a node is positive