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Law of Constant Proportion

nounverified·updated May 18, 2026

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(chemistry) law stating that every pure substance always contains the same elements combined in the same proportions by weight

MWE

Classifications

per-axis with provenance

Entity Type

Unknown—authoritativeglossary_import_default_pending_classifier

?unassignedlast reviewed —

Sensitivity

unclassified

Information Class

unclassified

Variants

4 surface forms

synonym: law of definite proportions
plural: Law of Constant Proportions
possessive: Law of Constant Proportion's
pluralpossessive: Law of Constant Proportions'

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