A small pond has a surface area of 0.15 ha and a depth of 1.5 m, andcontains 10 ppm (10 mg/liter) of benzene (C6H6).a. for methane has been determined to be 12 cm/hr. b.Estimate the concentration of benzene in the pond after a week, assuming that only volatilization is acting to remove benzene fromthe pond.

What amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees celsius to a solid at the same temperature? melting point of substance y = 35 degrees c; δhvaporization = 3.67 j/mol; δhfusion = 3.30 j/mol. mwsubstance y = 28.22 g/mol. −12.4 j −3.51 x 102 j 1.24 x 101 j 351 j