Recent questions in Chemistry

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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 NamSampson2 (1.8k points)

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1 answer 121 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 JaredOliva6 (2.2k points)

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1 answer 85 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 OrenTherrien (1.8k points)

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1 answer 91 views

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

asked Jan 30 in Analytical Chemistry by ARIDrusilla (1.7k points)

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1 answer 112 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 EarnestineFo (2.1k points)

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1 answer 108 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 MathewForman (1.6k points)

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1 answer 104 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 VictorR1855 (2.2k points)

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1 answer 106 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 YRPAbe659621 (2.3k points)

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1 answer 98 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 DanaValentin (1.5k points)

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1 answer 87 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 JamaalEnnor6 (1.9k points)

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1 answer 96 views

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

asked Jan 30 in Analytical Chemistry by DanaPittmann (1.5k points)

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1 answer 90 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 NanVanwagene (1.8k points)

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1 answer 62 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 DannieGuf001 (2.3k points)

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1 answer 89 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 ColinVanderm (2.0k points)

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1 answer 75 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 MagdaMeares (1.8k points)

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1 answer 98 views

What is the amount of copper ions in a 0.1 M CuSO4 solution if it takes 10 minutes to completely electrolyze (under constant current of 0.15 A) a 35-mg copper wire which is in contact with the solution?

asked Jan 30 in Analytical Chemistry by JereGerald1 (1.6k points)

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1 answer 111 views

What is the amount of copper in a sample of copper ore using coulometric titration with a silver anode?

asked Jan 30 in Analytical Chemistry by IvoryWithers (1.8k points)

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1 answer 96 views

What is the amount of copper in a sample of an unknown compound if 25.0 mL of a 0.050 M EDTA solution is required to titrate a 0.100 g sample of the compound using coulometry?

asked Jan 30 in Analytical Chemistry by Ben56061281 (1.4k points)

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1 answer 96 views

What is the amount of copper (II) sulfate in a sample of solution if 4.00 coulombs of charge are needed to completely oxidize it at the anode during a coulometric titration? The molarity of the titrant solution is 0.025 M and the volume of the titrant used is 100 mL.

asked Jan 30 in Analytical Chemistry by AntonioDaven (1.7k points)

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1 answer 104 views

What is the amount of copper (Cu) in a sample of brass weighing 10.5 grams, if the sample was dissolved in sulfuric acid and the resulting Cu2+ ions were fully reduced using coulometry, requiring a total charge of 1150 C? (Assume 100% current efficiency and Faraday's constant as 96500 C/mol.)

asked Jan 30 in Analytical Chemistry by BarneyUyv133 (1.7k points)

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