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A Collection of First Editions Is Donated to the University

question 20

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A collection of first editions is donated to the university for its library.Which is the correct credit?


Definitions:

HA

Often shorthand for hydroxyapatite, a mineral form of calcium apatite; can also refer to hyaluronic acid or other context-specific chemical compounds.

Equilibrium

A state in which opposing forces or influences are balanced, often used in chemistry to describe reactions where reactants and products are formed at the same rate.

Products

Substances formed as a result of a chemical reaction, appearing on the right side of a chemical equation.

Reactants

Substances that undergo chemical changes in a reaction, transforming into products.

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