Why do mixtures not have chemical formulas?

Simply because a mixture consists of multiple elements and/or compounds mixed together. A single compound though consists of atoms bonded chemically together according to a set ratio - e. read more

The individual components within a mixture may have a chemical formula. Eg. Air is a mixture comprising O2, N2, CO2 and the inert gases. But the composition of air can vary, so as a whole it does not have a fixed chemical formula. read more

The mixture doesn't have any given chemical formula, because sometimes it might be mostly A with some B and sometimes it might be almost all B with only a tiny bit of A. There's one exception to this: Sometimes you'll see formulas given for mixtures where the proportions are known, e.g. a particular mineral might have a"formula" of Ca(0.8)Mg(0.2)CO(3) where the numbers in parentheses represent subscripts. read more

Mixtures may contain various compounds and elements in different proportions and the thing is these constituents are not chemically bonded together and can't be written as “one formula”. Mixture reprents more than one molecule. read more

Only chemical compounds have a chemical formula; a mixture is a mix of chemical compounds with different formulas. read more

Best Answer: Chemical formulae describe fixed compositions. Mixtures are of variable composition, so a formula cannot be assigned. read more