Recent questions in Chemistry

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What is the composition and concentration of different gases in a gas mixture (such as air) and how can they be separated and analyzed using gas chromatography?

asked Jan 30 in Analytical Chemistry by TrenaArmfiel (450 points)

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1 answer 72 views

What is the chemical structure of the unknown compound, X, based on its NMR spectrum, which exhibits a singlet at 1.9 ppm and a quartet at 7.2 ppm, with J value of 8 Hz?

asked Jan 30 in Analytical Chemistry by FerdinandHoo (270 points)

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1 answer 56 views

What is the chemical structure of the unknown compound X, which exhibits the NMR spectrum below: - a singlet at δ 1.2 ppm (integral = 3H)- a triplet at δ 1.4 ppm (integral = 2H)- a quartet at δ 2.0 ppm (integral = 2H)- a doublet at δ 2.5 ppm (integral = 3H)- a singlet at δ 7.3 ppm (integral = 1H)

asked Jan 30 in Analytical Chemistry by DavidaTkm89 (230 points)

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1 answer 79 views

What is the chemical structure of compound X, based on the nuclear magnetic resonance (NMR) spectra?

asked Jan 30 in Analytical Chemistry by MMJCelina601 (190 points)

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1 answer 81 views

What is the chemical structure of compound X, as determined by analyzing its nuclear magnetic resonance spectrum?

asked Jan 30 in Analytical Chemistry by DonnaAuger4 (350 points)

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1 answer 83 views

What is the chemical structure of an unknown compound if its proton NMR spectrum displays a triple peak at δ 1.2, a singlet peak at δ 2.0, a doublet peak at δ 3.6, and a quartet peak at δ 7.5?

asked Jan 30 in Analytical Chemistry by MarcellaZuj2 (350 points)

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1 answer 69 views

What is the chemical formula of the unknown compound that has a molecular ion peak (M+) at m/z 146, and major fragment peaks at m/z 120 and 105 in the mass spectrum, and has the molecular ion peak four times more intense than the base peak? Use mass spectrometry to identify the unknown compound.

asked Jan 30 in Analytical Chemistry by HoraceBavist (350 points)

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1 answer 64 views

What is the chemical formula of an unknown compound that contains 60% carbon, 13.3% hydrogen, and 26.7% oxygen by mass, determined through elemental analysis?

asked Jan 30 in Analytical Chemistry by KeriL9813532 (410 points)

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1 answer 69 views

What is the chemical composition of a sample of unknown compound using X-ray diffraction analysis?

asked Jan 30 in Analytical Chemistry by DannieTromml (210 points)

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1 answer 85 views

What is the chemical composition of a given rock sample? Use X-ray diffraction analysis to identify the minerals present in the sample and determine their relative abundances.

asked Jan 30 in Analytical Chemistry by NannieSerna1 (430 points)

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1 answer 93 views

What is the chemical composition of a given crystalline substance using X-ray diffraction analysis and how can it be determined from the diffraction pattern obtained?

asked Jan 30 in Analytical Chemistry by BirgitBrassa (630 points)

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1 answer 62 views

What is the best electrophoresis technique to use for separating and analyzing the composition of proteins in a complex sample mixture?

asked Jan 30 in Analytical Chemistry by Mckenzie2132 (1.2k points)

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1 answer 83 views

What is the amount of silver ions present in a sample of a 0.500 M silver nitrate solution after the complete electrolysis of 50.0 mL using coulometric titration at a constant current of 2.00 mA for 25.0 minutes?

asked Jan 30 in Analytical Chemistry by ImaSchardt52 (470 points)

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1 answer 85 views

What is the amount of CuSO4 present in a given sample using coulometry if a constant current of 50 mA is passed through the sample for 30 minutes, and 30.6 mA-h of charge is consumed in the process?

asked Jan 30 in Analytical Chemistry by Susan1196249 (370 points)

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1 answer 77 views

What is the amount of copper sulfate (CuSO4) present in a sample of 5.00 grams of a compound containing only copper sulfate? Use gravimetric analysis to determine the answer.

asked Jan 30 in Analytical Chemistry by SMOBrooks167 (390 points)

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1 answer 75 views

What is the amount of copper present in a 2-g copper wire using coulometry?

asked Jan 30 in Analytical Chemistry by SheriFkw4940 (430 points)

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1 answer 69 views

What is the amount of copper present in a 0.2500 g sample of a copper salt, if it requires 12500 C of electricity to completely deposit it during coulometric titration?

asked Jan 30 in Analytical Chemistry by WinstonGinn (510 points)

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1 answer 40 views

What is the amount of copper ions present in a sample if 5.25 grams of the sample produces a current of 2.35 A for 2 hours during coulometry analysis? The molar mass of copper is 63.55 g/mol and the sample contains only copper ions.

asked Jan 30 in Analytical Chemistry by EdmundoOjeda (330 points)

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1 answer 72 views

What is the amount of copper ions present in a 1.0 mL sample of copper sulfate solution, when a current of 3.0 A for 10 seconds is used for coulometry analysis, assuming 100% efficiency in electrode reactions and a coulombic efficiency of 90%?

asked Jan 30 in Analytical Chemistry by RedaColley62 (290 points)

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1 answer 56 views

What is the amount of copper ions present in a 0.01 M CuSO4 solution that is electrolyzed for 10 minutes using a current of 0.3 A?

asked Jan 30 in Analytical Chemistry by JavierDallas (270 points)

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