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MHT CET202124 Sep 2021Morning ShiftChemistrySome Basic Concepts of ChemistryActual

How many molecules of ammonia gas are present in 67.2 dm ^3 , measured at S.T.P.?

Options

  1. A2.0 10²⁴
  2. B1.0 10²³
  3. C1.8 10²⁴
  4. D5.0 10²⁴

Correct answer

C. 1.8 10²⁴

Step-by-step solution

aligned & Number of moles of gas = Given volume 22.4 & = 67.2 22.4 =3 moles aligned Number of molecules = moles N _ A aligned & =3 6 10²³ & =18 10²³ & =1.8 10²⁴ aligned

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