Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2015ChemistrySome Basic Concepts of ChemistryActual

If Avogadro number N A , is changed from 6.022 × 10 23   m o l - 1 to 6.022 × 10 20   m o l - 1 , this would change:

Options

  1. AThe definition of mass in units of grams
  2. BThe mass of one mole of carbon
  3. CThe ratio of chemical species to each other in a balanced equation.
  4. DThe ratio of elements to each other in a compound.

Correct answer

B. The mass of one mole of carbon

Step-by-step solution

Mass of 1 mol ( 6.022 × 1 0 23   a t o m s ) of carbon = 12g If Avogadro Number ( N A ) is changed then mass of 1 mol ( 6.022 × 1 0 20   a t o m ) of carbon = 12 × 6.022 × 1 0 20 6.022 × 1 0 23 = 12 × 1 0 - 3   g

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. [Molar mass of potassium chlorate = 122.5 g mol ⁻¹ ] 2026Find the mass of lime obtained by heating 500 g of 90 % pure lime stone. [Molar masses Ca =40 g/mol, O =16 g/mol & C =12 g/mol] 2026A coordination complex contains 2.6 % of Mg. Find the number of Mg atoms in 5.0 g of this sample. (gram atomic mass of Mg = 24 g ) 2026Calculate the number of moles and molecules of chlorine in 4.48 dm ^3 of chlorine at STP. 2026What is the gram atomic mass of an element whose mass of one atom is 3.9853 10⁻²³ g ? 2026Calculate the total mass and number of molecules present in 3 moles of benzene. 2026Which of the following gases has high vapour density at same temperature and pressure? 2026What is the number of moles of Cl atoms present in n moles of tear gas and in n moles of mustard gas respectively? 2026 Full Some Basic Concepts of Chemistry list All NEET PYQs