8) Another new element, Presitigium, has two isotopes. 67.52% of the Prestigium isotopes have a mass of 256 amu. The rest of the sample is Prestigium-257. Find the average atomic mass of Prestigium.

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.