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law of definite proportions

 

Definitions from WordNet

Noun law of definite proportions has 1 sense
  1. law of constant proportion, law of definite proportions - (chemistry) law stating that every pure substance always contains the same elements combined in the same proportions by weight
    --1 is a kind of law, law of nature

Definitions from the Web

Law of Definite Proportions

Definition: The law of definite proportions, also known as the law of constant composition, states that a chemical compound will always contain the same elements in fixed and definite proportions by mass.

Examples:

  1. As a scientific principle: According to the law of definite proportions, water (H₂O) will always consist of 11.19% hydrogen and 88.81% oxygen by mass.
  2. In a legal context: The law of definite proportions can be applied in forensic investigations to determine the exact composition of substances found at crime scenes.

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