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Caculate the root mean square velcity of...

Caculate the root mean square velcity of molecules of a gas whose densilty is `1.4kgm^(-3)` at a pressure of `76cm` of mercury (sp. gr. sp.of mercury `=13.6` and `g=9.81ms^(-2)`)

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Convert a pressure of 76 cm of mercury into Nm^(-2) . Density of mercury is 13.6 gm//c c .

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Knowledge Check

  • The number of molecules in 1 cm^(3) of an ideal gas at 0^(@)C and at a pressure of 10^(–5) mm of mercury is –

    A
    `2.7xx10^(11)`
    B
    `3.5xx10^(11)`
    C
    `6.0xx10^(23)`
    D
    `6xx10^(12)`

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