PV = nRT
where, P = pressure = 0.985 atm
V = volume = 5.19 L
n = number of moles
R = gas constant
T = temperature = 37.0 + 273 = 310 K
0.985 * 5.19 = n * 0.0821 * 310
5.11 = n * 25.5
n = 5.11 / 25.5 = 0.201 mole
Therefore, the number of moles of gas = 0.201
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