What is always coming, but never arrives? What can be broken, but is never held?

What is it that lives of it is fed, and dies of you give it a drink?

Ido not know i use to

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.