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Number of molecules in a volume of 4 cm³ of a perfect monoatomic gas at some temperature T and at a pressure of 2 cm of mercury is close to? (Given, mean kinetic energy of a molecule (at T) is 4 × 10⁻¹⁴erg, g = 980 cm/s², density of mercury = 13.6 g/cm³ )

Option 1 -

5.8 * 10¹⁸

Option 2 -

4.0 * 10¹⁶

Option 3 -

5.8 * 10¹⁶

Option 4 -

4.0 * 10¹⁸

0 3 Views | Posted a month ago
Asked by Shiksha User

  • 1 Answer

  • A

    Answered by

    alok kumar singh | Contributor-Level 10

    a month ago
    Correct Option - 4


    Detailed Solution:

    Use the equation to find ' N ':
    P = 2/3 (v) (N/V) (1/2 mu²)

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