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NEETChemistrySome Basic Concepts of Chemistry

How was the Avogadro number determined precisely?

Options

  1. ABy counting atoms directly
  2. BBy using a mass spectrometer to determine the mass of a carbon-12 atom
  3. CBy measuring the volume of a mole of a substance
  4. DBy conducting chemical reactions

Correct answer

B. By using a mass spectrometer to determine the mass of a carbon-12 atom

Step-by-step solution

The Avogadro number was determined precisely by using a mass spectrometer to find the mass of a carbon-12 atom.

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