The discussion focuses on converting a volume mixing ratio from [m3/m3] to [molecules/cm3] using the ideal gas law and Avogadro's hypothesis. The temperature is specified as 293K and the air density as 1 kg/m3. Participants emphasize the need to understand how to convert gas volume to moles and subsequently to molecules, highlighting the importance of density in determining pressure for calculations. The conversion process is essential for determining the number of gas molecules present in a specified volume of air.
PREREQUISITESChemists, environmental scientists, and anyone involved in atmospheric studies or gas mixing calculations will benefit from this discussion.
Hi! Well not exactly. I know there is the ideal gas formula PV = nRT and that a mole contains the Avogadro number of molecules.Borek said:Do you know Avogadro's hypothesis?
And do you know how to convert gas volume to number of moles? Number of moles to number of molecules?
The volume mixing ratio can also be given in [mol/mol]. How do you convert a mol of gas into the number of molecules when only the air density and temperature are given?anuttarasammyak said:[m3/m3] has no physical dimension but [molecules/cm3] has physical dimension of L^-3. I am afraid some more details of the exercise are required to help you.