Answer:
375.8 × 10²³ molecules
Explanation:
Given data:
Number of molecules of acetylene = ?
Volume of cylinder = 1400 L
Temperature = standard = 273.15 K
Pressure = standard = 1 atm
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
PV = nRT
1 atm × 1400 L = n × 0.0821 atm.L/ mol.K × 273.15 K
1400 L.atm = n × 22.43 atm.L/ mol
n = 1400 L.atm / 22.43 atm.L/ mol
n = 62.4 mol
1 mole contain 6.022 × 10²³ molecules
62.4 mol × 6.022 × 10²³ molecules / 1 mol
375.8 × 10²³ molecules
