An experiment to determine compound partition among air, water, and soil phases was conducted by adding 1 gram of the compound to a reactor that had 1 m3 of air, 0,001 m3 of water0 and 100 g of solid. The reactor was at atmodpheric pressure and at aconstant tepmrature 20 C The compound has amolucular weght (MW) of 100 g/mol. Once equilibrium is reached, the air has a mass consentration of 0,5 g/m3 and tje water has a mass of consentration of 200 g/m3 . detremine the value of Henrys law constant Hc with unit of pa/(mol/m3)