of argon (atomic mass of Ar = 40 ) occupies volume of 22400 cm ^3 at STP.
Density of argon =1.69kg/m3= 1.69kg/m^3=1.69kg/m3
Mass =1.69×40=67.6Kg=1.69×40=67.6Kg=1.69×40=67.6Kg
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