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A solid sample adsorbs 0.63 mg of CO when the pressure of the gas is 36.0 kPa at 300 K. The mass of the gas

A solid sample adsorbs 0.63 mg of CO when the pressure of the gas is  36.0 kPa at 300 K. The mass of the gas adsorbed when the pressure is  4.0 kPa at 300 K is 0.21 mg. If the Langmuir isotherm applies for the  system, determine the fractional coverage at the two pressures.

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