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(chemistry) any process determined by the atomic and molecular composition and structure of the substances involved
law of conservation of mass
Is any physical change or chemical reaction, mass is conserved; Mass can be neither created nor destroy.
(chemistry) a substance consisting of two or more substances mixed together (not in fixed proportions and not with chemical bonding)
(astronomy) the particular appearance of a body's state of illumination (especially one of the recurring shapes of the part of Earth's moon that is illuminated by the sun)
a change from one state (solid or liquid or gas) to another without a change in chemical composition
A characteristic of a pure substance that can be observed without changing it into another substance
Describes the gaseous state of a substance that is generally a liquid or solid at room temperature
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