Elemental boron is produced in one industrial process by heating diboron trioxide, with magnesium metal. Magnesium oxide is produced as a by-product of this reaction. Write a balanced chemical equation to represent the chemical reaction describes and provide a piece of evidence that a reaction occurred

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.