Respuesta :
The sample which contains the smallest number of molecule is in 1.0 L of H₂ at 20 degree C and 760 torr.
What is Avogadro's number?
Avogadro's number is the number of entities present in per mole of any substance and it is equal to 6.022×10²³.
So moles and number of entities is directly proportional to each other. Moles of any gas will be calculated by using the ideal gas equation as:
PV = nRT, where
P = pressure
V = volume
n = moles
R = universal gas constant (value depends on units of pressure and temperature)
T = temperature (in Kelvin)
- Moles of H₂, N₂ & He at standard condition will be calculated as:
where R = 0.082 L.atm / K.mol
n = (1)(1) / (273.15)(0.082) = 0.044mole
- Moles of H₂ at 20 degreeC and 760torr condition will be calculated as:
where R = 62.36 L.torr / K.mol
n = (1)(760) / (62.36)(293.15) = 0.041mole
- Moles of N₂ at 0 degreeC and 800torr condition will be calculated as:
where R = 62.36 L.torr / K.mol
n = (1)(800) / (62.36)(273.15) = 0.046 moles
Hence number of molecules are less is in 1.0 L of H₂ at 20 degree C and 760 torr.
To know more about ideal gas equation, visit the below link:
https://brainly.com/question/24236411
