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Is it possible to calculate the number of volatile molecules (so only those in the gaseous phase) in a container of known volume, if the vapor pressure of the compound is known? So for example, if you have a container with a volume of $10\ \mathrm{ml}$ containing $3\ \mathrm{ml}$ of a Compound X with a vapor pressure of $10\ \mathrm{mmHg}$ at $\pu{25 ^\circ C}$, what is the number of gaseous molecules of X in the container?

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    $\begingroup$ Yes, this is a do-able calculation. $\endgroup$ – Chet Miller Sep 7 '20 at 23:50
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    $\begingroup$ We have a policy which states that ‎you should show your thoughts, effort and attempts to understand underlying principles and solve the question. It'll make us certain that ‎we aren't doing your homework for you. ( As homework is considered literal homework, self-study questions, puzzles, worked examples etc.) Next time, provide your full reasoning or thoughts on this, otherwise, the question may get closed.‎ See Homework. This question may get closed anyway. $\endgroup$ – Poutnik Sep 8 '20 at 3:15
  • $\begingroup$ Do you know about Raoult's law? $\endgroup$ – Aniruddha Deb Sep 8 '20 at 4:35