find the amount of energy needed to break down rust, iron (III) oxide, Fe2O3(s), to form 50.0 g of oxygen gas. Given: the molar mass of iron and oxygen is 55.85 g/mol and 16.00 g/mol respectively; and the enthalpy of formation of Fe2O3 is -824.2 kJ/mol.

Water ionizes by the equation h2o(l)⇌h+(aq)+oh−(aq) the extent of the reaction is small in pure water and dilute aqueous solutions. this reaction creates the following relationship between [h+] and [oh−]: kw=[h+][oh−] keep in mind that, like all equilibrium constants, the value of kw changes with temperature.

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.