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Hello everyone! I have trouble finding the answer to the following problem - this really bugs me. Can anyone give me a hint?

Here is the problem:

I have already calculated the average speed of the mercury atoms in the vapor to be

[tex] 169 m/s [/tex]

now the questions:

Here is the problem:

**A vessel contains a hole of 0.1mm^2 above the liquid level (contains liquid mercury) at T=0°C. The vessel is contained within a very much larger vessel in which a very high vacuum is maintained. After 30 days it is found that 24mg of mercury have been lost from the inner vessel. The relative atomic mass of mercury is 201.**I have already calculated the average speed of the mercury atoms in the vapor to be

[tex] 169 m/s [/tex]

now the questions:

**1)**What is the mean rate of flow of mercury atoms through the hole?**2)**hence calculate the vapour pressure at T=0°C*note:*

the numerical answers are:

1) 2.76 * 10^13 atoms/sec

2) 2.5 * 10^(-2) N/m^2the numerical answers are:

1) 2.76 * 10^13 atoms/sec

2) 2.5 * 10^(-2) N/m^2

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