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Problem- A new field technician was sent out to collect a groundwater sample from a monitoring well. He filled only half of the 40 mL sample vial with groundwater contaminated with benzene (T=20C). The benzene concentration in the collected groundwater was analyzed to be 5 mg/L.
a. What is the concentration of benzene in the headspace (in ppm V) before the vial was opened.
b. What is the true benzene concentration in the groundwater, if headspace free sample is collected.
Henry's law constant for benzene is 1/5.55 mol/L•atm.
I am not able to determine the correct answer for the above question please helps me to get the correct answer
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