Vaping is the breathing in /inhalation of and other
that have been turned into a vapor by the use of

Vaping is the breathing in, inhalation of flavorings/nicotine and other chemicals  that have been turned into a vapor by the use of  battery to heat up a special liquid into an aerosol that users inhale.

Vaping is the inhalation of vapor and other chemicals that have been turned into a vapor by the use of e-cigarettes.  

Explanation:

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.