Question

a mixture do not have Chemical formulae - give reason ​

Answer 1

Answer:

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.g water is H2O: two hydrogens, one oxygen in a fixed ratio that never changes & can be easily expressed as a formula. In a mixture though, the proportions of the constituents can (and often do) change - e.g a mixture of a compound in aqueous solution may be concentrated by evaporation or diluted by the addition of more water. That cannot be expressed in simple terms using chemical formulae.

hope it helps my frnd...

Answer 2

Answer:

These elements are always present in same proportions ( because they are chemically bonded together) and the formula stays as it is. 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”.

Explanation:

hope its help you