Which of the following is an illustration of the law of constant composition?
A) Water and salt have different boiling points.
B) Water boils at 100°C at 1 atm pressure.
C) Water is a compound.
D) Water can be separated into other substances by a chemical process.
E) Water is 11% hydrogen and 89% oxygen by mass.

Question

Quizplus · Accepted Answer

The law of constant composition, also known as the law of definite proportions, states that a given compound always contains the same elements in the same proportion by mass. The fact that water is always 11% hydrogen and 89% oxygen by mass illustrates this law.

Which of the Following Is an Illustration of the Law