Question

The proportion by weight of the constituent elements in different samples of compound is constant. 
True or false​

Answer 1

Answer:

In chemistry, the law of definite proportion, sometimes called Proust's law, or law of constant composition states that a given chemical compound always contains its component elements in fixed ratio (by mass) and does not depend on its source and method of preparation. For example, oxygen makes up about 8/9 of the mass of any sample of pure water, while hydrogen makes up the remaining 1/9 of the mass. Along with the law of multiple proportions, the law of definite proportions forms the basis of stoichiometry.[1]

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Answer 2

The proportion by weight of the constituent elements in different samples of the compound is constant is True.

• In science, the law of constant proportions or law of definite composition expresses that a given substance compound consistently contains its part components in a fixed proportion and doesn't rely upon its source and strategy for planning.
• Methane is one example of a chemical compound that obeys the law of constant proportions. Four hydrogen atoms combine with one carbon atom to form one methane molecule.