a)
PV = nRT
n = masa/miu
=> PVmiu = mRT
=> miu = mRT/PV
= 3,643x0,082(273+107)/4,5x1,25
=> miu = 20,18
daca este gaz monoatomic => gaz rar => Ne
b)
ro = masa/V = 3,643/4,5 = 0,81 g/dm3
c)
V = constant
n = m/miu = 3,643/20,18 = 0,18 moli
PV = nRT
=> P = nRT/V
= 0,18x0,082(273+2000)/4,5
= 7,46 atm