What are irrational numbers *plz give an example*

Irrational numbers have a long amount of numbers after the decimal place that never really end it would be like pi or the square root of two. Also irrational numbers can't be represented as a fraction

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.