Theory:

1Calculate the volume occupied by \(2.5\) \(moles\) of \(CO_2\) at STP.
 
Data:
 
Given number of moles of \(CO_2=2.5\)
 
Molar volume of \(CO_2\) at STP \(=22.4\) \(L\)
 
Solution:
  
NumberofmolesofCO2=VolumeofCO2atSTPMolarvolumeatSTP2.5=VolumeofCO2atSTP22.4VolumeofCO2atSTP=22.4×2.5=56L
 
Therefore, the volume occupied by \(2.5\) \(mole\) of \(CO_2\) at STP \(=56\) \(L\)
 
2.  Calculate the volume occupied by \(12.046\times10^{23}\) of ammonia gas molecules. 

Data:
 
Given the number of ammonia gas molecules \(=12.046\times10^{23}\)
 
Avogadro’s number \(=6.023\times10^{23}\)
 
Solution:
 
Numberofmoles=NumberofmoleculesAvogadro"snumber=12.046×10236.023×1023=2moles
 
VolumeoccupiedbyNH3=Numberofmoles×Molarvolume=2×22.4=44.8L
Therefore, the volume occupied by \(12.046\times10^{23}\) of ammonia gas molecules \(=44.8\) \(L\)
 
3.  Calculate the volume occupied by \(14\) \(g\) of nitrogen gas.
 
Data:
 
Given mass of nitrogen \(=14\) \(g\)
 
Atomic mass of nitrogen \(=28\)
 
Solution:
 
Numberofmoles=GivenmassoftheelementAtomicmassoftheelement=1428=0.5mole
 
VolumeoccupiedbyN2atSTP=No.ofmoles×MolarvolumeMass=0.5×22.4=11.2L
Therefore, the volume occupied by \(14\) \(g\) of nitrogen gas \(=11.2\) \(L\)