Compound p forms enamel of teeth. it is the hardest substance of the body. it does not dissolve in water but it is corroded when ph in the mouth is below 5.5. evaluate the reason for it and suggest a preventive measure to prevent dental decay.

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.