question_answer 6)

Estimate the total number of air molecules (inclusive of oxygen, nitrogen, water vapour and other constituents) in a room of capacity 25-0 m3 at a temperature of 27°C and 1 atm pressure. (Boltzmann constant ).  

Answer:

                Here,                                     Now, PV=nRT =n(Nk)T=(nN)k T=N? k T where, n N?= total no. of air molecules in the given gas