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Q: What is the fundamental unit of amount of a substance?
  • A. Mole
  • B. Candela
  • C. Kelvin
  • D. Meter
Correct Answer: Option A - Mole is a SI fundamental unit that measures the amount of the substance. one mole of substance consist of 6.023 × 10²³ atoms or other elementary particles which is called Avogadro number (approx. 6.023×10²³).
A. Mole is a SI fundamental unit that measures the amount of the substance. one mole of substance consist of 6.023 × 10²³ atoms or other elementary particles which is called Avogadro number (approx. 6.023×10²³).

Explanations:

Mole is a SI fundamental unit that measures the amount of the substance. one mole of substance consist of 6.023 × 10²³ atoms or other elementary particles which is called Avogadro number (approx. 6.023×10²³).