Strictly speaking, I suppose, all the laws of chemical combination are empirical: the law of definite proportions is verifiable in all cases that have been examined, except for variations that may be ascribed to errors of experiment.
The law to which we are led by experiment is, that the elements of bodies continue in definite proportions according to weight.
Again, the law that bodies combine chemically in definite proportions is undeniably true; but few besides Dr.
The act or process of uniting by chemical affinity, by which substances unite with each other in definite proportions by weight to form distinct compounds.
Saline compounds in definite proportions, of carbonic acid, with alkalis, earths, and the ordinary metallic oxides.
The union of stuffs with colouring matters appears, in general, not to take place in definite proportions; though there are probably some exceptions.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "definite proportions" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.