3. Avogadro constant: recent determinations
3.1 Relationships and redundancies between mass-related units
If Avogadro's number is a fundamental constant in physics and chemistry, it's because it links the microscopic and macroscopic scales not only for weight quantities, but also for electrical and thermal quantities. Avogadro's number is also a bridge between quantum and classical statistical descriptions of matter.
In experiments where a certain quantity of matter is measured and deposited by a quantity of electricity, Avogadro's constant links the elementary charge e to a macroscopically measurable quantity of electricity via Faraday's constant :
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Avogadro constant: recent determinations
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