How many grams of steam must react to produce 23.3 g of ferrous ferric oxide (Fe3O4)?

Consider the smelting of iron ore which consists of Fe2O3 and Fe3O4. If Fe is produced in the pig iron, and FeO is produced in the slag, what are the chemical equations involved?

Among the substances that react with oxygen and that have been considered as potential rocket fuels are diborane [B2H6(g), which produces B2O3(s) and H2O(g)], methane [CH4(g), which produces CO2(g) and H2O(g)], and hydrazine [N2H4(l), which produces N2(g) and H2O(g)]. On the basis of the heat released by 2.46 kg of each substance in its reaction with oxygen, and assuming that thermal energy is the most desirable property in rocket designs, evaluate the possibility of each being used as a rocket fuel. (Hint: Use the Supplemental Data to compute ΔHorxn in kJ/mol, and qsurr in MJ for each fuel. Enter unrounded values.) diboraneΔHorxn  kJ/molqsurr  MJ methaneΔHorxn  kJ/molqsurr  MJ hydrazineΔHorxn  kJ/molqsurr

The Haber Process, developed by Fritz Haber in 1909, was a revolutionary method for producing ammonia from elemental hydrogen and nitrogen on an industrial scale. Write a balanced equation showing the conversion from elemental nitrogen (N2) and hydrogen (H2) to ammonia (NH3). (Omit states-of-matter from your answer.)