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The densities of water and water vapour ...

The densities of water and water vapour are 1.0 `g*cm^(-3) and 0.0006g*cm^(-3)` respectively at `100^(@)C` and 1 atmm pressure. At this temperature, the total volume occupied by watrer molecules in 1L of water vapour is-

A

2.24 cc

B

0.6 cc

C

0.12 cc

D

1.72 cc

Text Solution

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The correct Answer is:
B
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At 100^(@)C and 1 atm pressure, the densities of water and water and water vapour are 1.0 g*mL^(-1) and 0.0006 g*mL^(-1) respectively. What is the total volume of water molecules in 1 litre of steam at 100^(@)C ?

The density of water is 1000 kg m^(-3) . The density of water vapour at 100^(@)C and 1 atm pressure is 0.6 kg m^(-3) . The volume of a molecule multiplied by the total number gives ,what is called, molecular volume. Estimate the ratio (or fraction) of the molecular volume to the total volume occupied by the water vapour under the above conditions of temperature and pressure.

Knowledge Check

  • At room temperature the no of molecules present in 1 drop of water (volume 0.0018 mL and density 1g/cc) is-

    A
    `6.02xx10^(23)`
    B
    `1.084xx10^(18)`
    C
    `4.84xx10^(17)`
    D
    `6.02xx10^(19)`

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