Question

All samples of a given compound, regardless of their source or how they were prepared, have the same proportions of their constituent elements. Which law does this refer to?

1) Law of Conservation of Mass
2) Law of Definite Proportions
3) Law of Multiple Proportions
4) Law of Combining Volumes

Answer 1

The Law of Definite Proportions states that a given chemical compound always contains the same elements in the same proportions by mass.

Step-by-step explanation:

The Law of Definite Proportions states that a given chemical compound always contains the same elements in the exact same proportions by mass. This means that regardless of the source or how the compound was prepared, the proportion of atoms of different elements in the compound will always be the same. For example, any sample of pure water will contain 11.19% hydrogen and 88.81% oxygen by mass.