In the following reaction, how many grams of ferrous sulfide (fes) will produce 0.56 grams of iron (iii) oxide (fe2o3)? 4fes + 7o2 → 2fe2o3 + 4so2 the molar mass of ferrous sulfide is 87.92 grams and that of iron (iii) oxide is 159.7 grams.

Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.