The balanced equation for the reaction is as follows 2H₂ + O₂ --> 2H₂O stoichiometry of H₂ to O₂ is 2:1 number of H₂ moles - 30.0 g / 2 g/mol = 15 mol number of O₂ moles - 80.0 g / 32 g/mol = 2.5 mol limiting reactant is the reagent in which only a fraction is used up in the reaction if H₂ is the limiting reactant if 2 mol of H₂ requires 1 mol of O₂ then 15 mol of H₂ requires 1/2 x 15.0 = 7.5 mol of O₂ but only 2.5 mol of O₂ is required this means that O₂ is the limiting reagentt and H₂ is in excess
Bohr thought that electrons orbited the nucleus in circular paths; whereas in the modern view atomic electron structure is more like 3D standing waves. Bohr built upon Rutherford's model of the atom. ... He believed that electrons moved around the nucleus in circular orbits with quantised potential and kinetic energies.
