ch2 ch2 reacts with hydrogen gas to give ch3ch3

Question

CH₂ CH₂ reacts with hydrogen gas to give CH₃CH₃ you need to Estimate the heat released when Bond enthalpies are H H : 436 kJ/mol., C C : 612 kJ/mol; C Br : 276 kJ/mol; C H : 412 kJ/mol; C C : 348 kJ/mol;

compute the number of mol of S represented by 1.810 x 10 ^-27 atoms of S, also determine the number of atoms of sulfur in 5.22 x 10 ^-7 kilograms of sulfur.