A subadditive function is a function, having a domain A and an ordered codomain B that are both closed under addition, with the following property: An example is the square root function, having the non-negative real numbers as domain and codomain, since we have:
Sbf5 is a nonpolar bond because the dipole moment is nonexistent. If you were to draw the chemical structure you would see that due to electronegativity of the fluorine atoms, that the vectors where the electrons are pulled away from the SB cancel one another, forcing SbF5 to be a nonpolar covalent molecule. non-polar compound occurs when there is an equal sharing of electrons between two different atoms. Examples of household non-polar compounds include fats, oil and petrol/gasoline.
Also, SO4 2- can evidently not be acidic as it does not have a proton to donate. SO4 2- is a weak base because it is the conjugate base of the weak acid HSO4 -. H3PO4 is a weak acid, so it does not fully ionise in water. Hence, H2PO4- can be treated as a weak, base as it is the conjugate base of a weak acid.