Chemistry, 27.12.2019 07:31 zanaplen27
Adrinking water supply is suspected of being contaminated with lead. samples of water aspirated directly into an air-acetylene flame gave an absorbance of 0.68 at 283.3nm. standard solutions containing 0.5 and 1.0 ppm were found to exhibit absorbances of 0.43 and 0.86 respectively. assuming the beer-lambert law is obeyed calculate the concentration of lead within the water sample. a. 79. oppm b. 0.79ppm c. 0.43ppm d. 0.96ppm e. 0.92ppm noeullib noilgoeps noods whaooah
Answers: 2
Chemistry, 22.06.2019 10:50
8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm
Answers: 1
Chemistry, 22.06.2019 14:30
Select the word from the list that best fits the definition the nuclear family into which a person is born or adopted.
Answers: 2
Chemistry, 22.06.2019 14:50
Which of the following is most likely true about water in chemical solutions?
Answers: 1
Adrinking water supply is suspected of being contaminated with lead. samples of water aspirated dire...
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