Iron contains 15% of Fe-55. Iron contains 85% of Fe-56. What is the average atomic mass of Iron? ​

Tell me the iupac name of the following compounds:

What is the atomic number of an atom that has 6 protons

Which formula equation represents the burning of sulfur to produce sulfur dioxide? s(s) + o2(g) 4502(9) 2h2s(s) + 302(g) —> 2h20(0) + 2502(9) 4fes2+1102 —> 2fe2o3 + 8502 2802(g) + o2(9) v205 , 2503(9)