In the molecule p-chlorotoluene (image attatched of molecule), what does the p at the beginning represent?

para

Explanation:

Ortho (o), meta (m), and para (p) refer to the location of the chloride substitution compared to the methyl group on toluene (toluene is characterized by the methyl at the top).

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.