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JEE Main202310 Apr 2023Morning ShiftChemistrySome Basic Concepts of ChemistryActual

The number of molecules and moles in 2 . 8375 litres of O 2 at STP are respectively

Options

  1. A7 . 527 × 10 23 and 0 . 125   mol
  2. B7 . 527 × 10 22 and 0 . 250   mol
  3. C1 . 505 × 10 23 and 0 . 250   mol
  4. D7 . 527 × 10 22 and 0 . 125   mol

Correct answer

D. 7 . 527 × 10 22 and 0 . 125   mol

Step-by-step solution

One mole of any ideal gas occupies 22 . 7 L at standard temperature and pressure. The number of moles = Given   volume Volume   at   STP Moles = 2 . 8375 22 . 7 = 0 . 125 The number of molecules = moles × N A Molecules = 0 . 125 × 6 . 022 × 10 23 = 7 . 527 × 10 22

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