Answer:
molecules
Explanation:
According to ideal gas equation:
![PV=nRT](https://tex.z-dn.net/?f=PV%3DnRT)
P = pressure of gas = 1 atm (at STP)
V = Volume of gas = 22.4 L
n = number of moles = ?
R = gas constant =![0.0821Latm/Kmol](https://tex.z-dn.net/?f=0.0821Latm%2FKmol)
T =temperature =
(at STP)
![n=\frac{PV}{RT}](https://tex.z-dn.net/?f=n%3D%5Cfrac%7BPV%7D%7BRT%7D)
![n=\frac{1atm\times 22.4L}{0.0821L atm/K mol\times 273K}=1mole](https://tex.z-dn.net/?f=n%3D%5Cfrac%7B1atm%5Ctimes%2022.4L%7D%7B0.0821L%20atm%2FK%20mol%5Ctimes%20273K%7D%3D1mole)
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number
of particles.
1 mole of
contains
molecules