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8 mole of a mixture of N(2), NO(2) and ...

8 mole of a mixture of `N_(2), NO_(2)` and `N_(2)O_(4)` has a mean molecular mass of `(378)/(8)` . On heating to a temperature at which `N_(2)O_(4)` dissociated completely `(N_(2)O_(4)rarr 2NO_(2))` , the mean molecular mass become `(378)/(9)`.
The ratio of number of moles of `N_(2)` and `NO_(2)` after heating is :

A

`1:1`

B

`3:9`

C

`2:7`

D

`1:2`

Text Solution

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The correct Answer is:
C
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Knowledge Check

  • 8 mole of a mixture of N_(2), NO_(2) and N_(2)O_(4) has a mean molecular mass of (378)/(8) . On heating to a temperature at which N_(2)O_(4) dissociated completely (N_(2)O_(4)rarr 2NO_(2)) , the mean molecular mass become (378)/(9) . The ratio of number of moles of N_(2): NO_(2):N_(2)O_(4) in original mixture is :

    A
    `3:4:1`
    B
    `2:5:1`
    C
    `3:5:2`
    D
    `4:2:3`

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    A
    0.043
    B
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    C
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  • A mixture of NO_(2) and N_(2)O_(4) has a vapour density of 38*3 at 300 K . What is the number of moles of NO_(2) in 100 g of the mixture ?

    A
    `0*043`
    B
    `4*4`
    C
    `3*4`
    D
    ` 0*437`

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