“amount of substance”的概念、定义、翻译、参考文献-科学参考

amount of substance

Physics

Symbol n. A measure of the number of entities present in a substance. The specified entity may be an atom, molecule, ion, electron, photon, etc., or any specified group of such entities. The amount of substance of an element, for example, is proportional to the number of atoms present. For all entities, the constant of proportionality is the inverse Avogadro constant. The SI unit of amount of substance is the mole.

Chemistry

A measure of the number of entities present in a substance. The specified entity may be an atom, molecule, ion, electron, photon, etc., or any specified group of such entities. The amount of substance of an element, for example, is proportional to the number of atoms present. For all entities, the constant of proportionality is the Avogadro constant. The SI unit of amount of substance is the mole.

Chemical Engineering

A measure of the number of entities present in a substance, such as atoms, molecules, ions, and electrons, etc., expressed in moles. For example, the amount of an element is proportional to the number of atoms present where one mole of that element is equal to 6.022 1367 × 10²³ atoms, which is Avogadro’s constant. It is given by:
$n = \frac{N}{N_{A}}$

(p. 13) where N is the number of atoms and N_A is Avogadro’s constant. The SI unit is the mole. It is also known as chemical amount.

Biology

Symbol n. A measure of the number of entities present in a substance. The specified entity may be an atom, molecule, ion, electron, photon, etc., or any specified group of such entities. The amount of substance of an element, for example, is proportional to the number of atoms present. The SI unit of amount of substance is the mole.

单词	amount of substance
释义	amount of substance Physics Symbol n. A measure of the number of entities present in a substance. The specified entity may be an atom, molecule, ion, electron, photon, etc., or any specified group of such entities. The amount of substance of an element, for example, is proportional to the number of atoms present. For all entities, the constant of proportionality is the inverse Avogadro constant. The SI unit of amount of substance is the mole. Chemistry A measure of the number of entities present in a substance. The specified entity may be an atom, molecule, ion, electron, photon, etc., or any specified group of such entities. The amount of substance of an element, for example, is proportional to the number of atoms present. For all entities, the constant of proportionality is the Avogadro constant. The SI unit of amount of substance is the mole. Chemical Engineering A measure of the number of entities present in a substance, such as atoms, molecules, ions, and electrons, etc., expressed in moles. For example, the amount of an element is proportional to the number of atoms present where one mole of that element is equal to 6.022 1367 × 10²³ atoms, which is Avogadro’s constant. It is given by: $n = \frac{N}{N_{A}}$ (p. 13) where N is the number of atoms and N_A is Avogadro’s constant. The SI unit is the mole. It is also known as chemical amount. Biology Symbol n. A measure of the number of entities present in a substance. The specified entity may be an atom, molecule, ion, electron, photon, etc., or any specified group of such entities. The amount of substance of an element, for example, is proportional to the number of atoms present. The SI unit of amount of substance is the mole.
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