Recent questions in Analytical Chemistry

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What is the percentage of nitrogen, carbon, and hydrogen in a sample of caffeine obtained from coffee beans? Use elemental analysis to determine the composition of the sample.

asked 5 days ago in Analytical Chemistry by EdmundoFlora (590 points)

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1 answer 49 views

What is the percentage composition of carbon, hydrogen, and nitrogen in a sample of caffeine, using elemental analysis?

asked 5 days ago in Analytical Chemistry by RobbinTerril (470 points)

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What is the percentage composition of carbon, hydrogen, and nitrogen in a sample of caffeine? Use elemental analysis to determine the answer.

asked 5 days ago in Analytical Chemistry by LettieWtt655 (510 points)

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What is the percent composition of carbon, hydrogen, and nitrogen in a sample of caffeine? Use elemental analysis to determine the answer.

asked 5 days ago in Analytical Chemistry by MarilouRicar (510 points)

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What is the percent composition of carbon, hydrogen, and nitrogen in a 10 gram sample of caffeine? Use elemental analysis to determine the answer.

asked 5 days ago in Analytical Chemistry by SofiaBrunson (450 points)

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What is the structure of the unknown compound X, based on its nuclear magnetic resonance spectrum, which shows a singlet at δ 7.8 ppm and a triplet at δ 1.2 ppm?

asked 5 days ago in Analytical Chemistry by RosalindaFra (510 points)

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What is the structure of compound X, based on its nuclear magnetic resonance spectroscopy spectrum, which displays a singlet at 3.8 ppm and a quartet at 1.2 ppm?

asked 5 days ago in Analytical Chemistry by CarrieBlackm (430 points)

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What is the structure of compound X based on its proton NMR spectrum, which shows a singlet at 1.2 ppm with an integration of 3, a doublet at 2.5 ppm with an integration of 2, and a quartet at 3.7 ppm with an integration of 1?

asked 5 days ago in Analytical Chemistry by TiffinydeLar (370 points)

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1 answer 51 views

What is the structure of an unknown compound with molecular formula C5H10O2 that exhibits singlets in its 1H-NMR spectrum at δ 1.1, 2.3 and 3.7 ppm and a doublet at δ 2.9 ppm?

asked 5 days ago in Analytical Chemistry by KandiCrouse (730 points)

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What is the concentration of lead in a water sample collected from a nearby river? analyze the sample using Atomic Absorption Spectroscopy and report the result in ppm.

asked 5 days ago in Analytical Chemistry by AlisonAkers2 (550 points)

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What is the concentration of lead ions in a water sample collected from a contaminated site? Use atomic absorption spectroscopy to quantify the lead ions in the sample and report your results in ppm.

asked 5 days ago in Analytical Chemistry by NinaPichardo (330 points)

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What is the unidentified compound present in a given sample, and what is its molecular weight, using mass spectrometry?

asked 5 days ago in Analytical Chemistry by DeenaGay9005 (530 points)

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What is the structure of Compound X? Use nuclear magnetic resonance spectroscopy (NMR) to determine the functional groups present and their respective positions in the molecule.

asked 5 days ago in Analytical Chemistry by Pearline4366 (310 points)

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Which functional groups are present in compound X as determined by its infrared spectrum, and what structural features of the compound are suggested by the observed IR peaks?

asked 5 days ago in Analytical Chemistry by SherrillBlos (510 points)

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What specific functional group is present in compound X as determined by UV-Vis spectroscopy analysis?

asked 5 days ago in Analytical Chemistry by GMBCarmon086 (530 points)

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1 answer 58 views

What is the concentration of lead in a water sample collected from a nearby river using atomic absorption spectroscopy?

asked 5 days ago in Analytical Chemistry by RainaGumm51 (250 points)

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1 answer 52 views

What is the elemental composition in a soil sample collected from a farm field that has been subjected to excessive use of synthetic fertilizers for the past five years? Use the information obtained from the elemental analysis to suggest alternative fertilization techniques that would improve soil health and preserve long-term fertility.

asked 5 days ago in Analytical Chemistry by MahaliaSchul (570 points)

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1 answer 46 views

What is the pH of a 0.01 M solution of HCl? Use a pH meter to determine the pH of the solution and explain the procedure you used to obtain the result.

asked 5 days ago in Analytical Chemistry by IndiraLittle (430 points)

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1 answer 52 views

What is the pH of a solution that has a hydrogen ion concentration of 0.001 M? Use a pH meter to determine the pH value of the solution.

asked 5 days ago in Analytical Chemistry by TanyaPridgen (570 points)

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1 answer 68 views

What is the purity level of a sample of caffeine obtained from a local vendor? Determine the purity of the sample by taking multiple melting point readings and comparing the results to the literature value of caffeine's melting point.

asked 5 days ago in Analytical Chemistry by OMDAlyce2017 (490 points)

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