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Compressed natural gas is stored in a spherical tank, 8 meters in diameter, at ambient temperature (25 °C) and at a pressure of 220 atm. Assuming that the natural gas may be approximated as pure methane, which has physical properties as listed below, determine the mass (kg) of natural gas contained within the storage tank. Methane physical properties:
Molar mass M = 16.043 kg/kmol Critical temperature TC = 191.1 KGas constant R = 0.5182 kJ/kg K Critical pressure PC = 4.64 MPa
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