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.

How much would the freezing point of water decrease if 4 mol of sugar were added to 1 kg of water(k=1.86 c/mol/kg for water and i=1 for sugar

What is a property of a double replacement reaction

Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.