(a)
volume at T = 26 K,
moles of helium,
n = 10.1 / 4 = 2.525 moles
according to gas equation,
P*V = n*R*T
V1 = n*R*T1 / P
V1 = 2.525*8.314*26 / 1.013*10^5
V1 = 5.38*10^(-3) m^3
(b)
volume at T = 295 K
V2 = n*R*T2 / P
V2 = 2.525*8.314*295 / 1.013*10^5
V2 = 6.11*10^(-2) m^3
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