What is the concentration of hydrogen ions commonly expressed as

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.

One similarity and one difference between an element and a mixture of elements

What are the names of these two interactions with cattle and how do they differ from each other