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The correct order of total number of atoms present in (A) 2 moles of cyclohexane (B) 684 g of sucrose (C) 90.8 L of dihydrogen at STP is:

Options

  1. AC>A>B
  2. BC>B>A
  3. CB>C>A
  4. DB>A>C

Correct answer

D. B>A>C

Step-by-step solution

For (A): Formula of cyclohexane is C₆H₁₂ . Number of atoms per molecule = 6 + 12 = 18 . Total number of atoms in 2 moles = 2 18 N_A = 36 N_A . For (B): Formula of sucrose is C₁₂H₂₂O₁₁ . Molar mass of sucrose = 342 g/mol. Number of moles = 684 342 = 2 moles. Number of atoms per molecule = 12 + 22 + 11 = 45 . Total number of atoms = 2 45 N_A = 90 N_A . For (C): Formula of dihydrogen is H₂ . Number of moles at STP = 90.8 22.7 = 4 moles. Number of atoms per molecule = 2 . Total number of atoms = 4 2 N_A = 8 N_A . Compa

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