Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET
Exam
NEET
Subject
Chemistry
Chapter
Some Basic Concepts of Chemistry

NEET · Chemistry · Some Basic Concepts of Chemistry

How was the Avogadro number determined precisely?

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.
Practice Some Basic Concepts of Chemistry on Quantrex Academy →

More from Some Basic Concepts of Chemistry

Calculate the mass of potassium chlorate required to liberate 6.72 dm^3 of oxygen at STP.… MHT CET Medical 2026Find the mass of lime obtained by heating 500 g of 90\% pure lime stone. [Molar masses… MHT CET Medical 2026A coordination complex contains 2.6\ \% of Mg. Find the number of Mg atoms in 5.0 g of… MHT CET Medical 2026Calculate the number of moles and molecules of chlorine in 4.48\ dm^3 of chlorine at STP. MHT CET Medical 2026What is the gram atomic mass of an element whose mass of one atom is 3.9853 × 10^ -23 \ g… MHT CET Medical 2026Calculate the total mass and number of molecules present in 3 moles of benzene. MHT CET Medical 2026Which of the following gases has high vapour density at same temperature and pressure? MHT CET Medical 2026What is the number of moles of Cl atoms present in n moles of tear gas and in n moles of… MHT CET Medical 2026 Full Some Basic Concepts of Chemistry list All NEET PYQs