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MHT CET Medical202622 April 2026Morning ShiftChemistrySome Basic Concepts of ChemistryActual

Calculate the total mass and number of molecules present in 3 moles of benzene.

Options

  1. ATotal mass = 78 g and number of molecules = 6.022 10²³
  2. BTotal mass = 156 g and number of molecules = 1.2044 10²⁴
  3. CTotal mass = 334 g and number of molecules = 6.022 10²³
  4. DTotal mass = 234 g and number of molecules = 1.8066 10²⁴

Correct answer

D. Total mass = 234 g and number of molecules = 1.8066 10²⁴

Step-by-step solution

The molecular formula of benzene is C₆H₆ . Molar mass of benzene = 6 12 + 6 1 = 78 g/mol . Total mass of 3 moles of benzene = 3 78 = 234 g . Number of molecules in 3 moles = 3 6.022 10²³ = 18.066 10²³ = 1.8066 10²⁴ . Answer: Total mass = 234 g and number of molecules = 1.8066 10²⁴

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