True or false? & What is the product?
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True or false? & What is the product?
The elution order does not change when the...
Hi can someone help me with my pre lab theory questions (1,2,3) on rate of elution...
Hi can someone help me with my pre lab theory questions (1,2,3)
on rate of elution or Rf? Here is some background below. Please
help explain as many as possible (1-3)! I dont really get the
relation ships in this lab, thank you!
1. What factors affect the rate of elution in organic compounds? 2. Explain what is the relationship between polarities of compounds (polar/non- polar compound) and rate of elution (Rf). 3. Explain what is the relationship between solvent...
A.) What factors cause the order of elution to change? B.) If two unknown compounds are...
A.) What factors cause the order of elution to change? B.) If two unknown compounds are analyzed via thin-layer chromatography first using pure petroleum ether as the eluant and then 75:25 petroleum ether-ethyl acetate, how will the Rf values between plates change or can you not tell with the given information?
Aspirin is more polar than ibuprofen. In reverse phase liquid chromatography, what is the elution order?...
Aspirin is more polar than ibuprofen. In reverse phase liquid chromatography, what is the elution order? a. aspirin will elute before ibuprofen b. aspirin will have a longer retention time than ibuprofen c. aspirin will elute after ibuprofen d. ibuprofen will have a shorter retention time than aspirin
36. True or False: In order to accomplish the same change in aggregate demand, the government...
36. True or False: In order to accomplish the same change in aggregate demand, the government will always need to increase spending more than a change a tax. a. True b. False 37. When the government increases taxes and government spending by the same amount a. The Ricardo-Barro effect predicts less savings and the government is still b. The government must increase the deficit to finance the spending and the c. There is no change in the government budget deficit...
Which of the following statements about an Svl mechanism is (are) true? 4. A. The reaction...
Which of the following statements about an Svl mechanism is (are) true? 4. A. The reaction is fastest with 3° halides. B. The rate of the reaction increases when the solvent is changed from (CHs):C-O to CH&CH:OH C. The identity of the leaving group does not affect the reaction rate. D. Statements (The reaction is fastest with 3° halides) and (The rate of the reaction increases when the solvent is changed from (CHs):C-0 to CH CH OH) are true. E....
For a solution equilibrium, a change in concentration of a reactant or product does not change...
For a solution equilibrium, a change in concentration of a reactant or product does not change Kc. True/False?
true/false: 1. the major product when p-ethylbenzoic acid is treated with a mixture of concentrated nitric...
true/false:
1. the major product when p-ethylbenzoic acid is treated with
a mixture of concentrated nitric and sulfuric acids will be
4-ethyl-3-nitro-benzoic acid.
7.-10. multiple choice is pictured below
Multiple Choice 7. Which of the following will react with Cl2/AlCl3 at the fastest rate? Benzoic acid B. toluene C. bromobenzene D. anisole 8. Which of the following reagents will reduce p- nitrotoluene to p-methylaniline? A. W-K. B. H2Cr04 C. H2, Ni D. NBS, light 9. Which of the reagents in...
5. True/False: For a given transfer of energy, a greater change in entropy occurs when the...
5. True/False: For a given transfer of energy, a greater change in entropy occurs when the temperature is high. False, because as temperature decreases there is a greater change in entropy. False, because only heat flow affects the change in entropy, not temperature. True
True/False Questions 1. True/False: Thin filaments do not change length when a muscle contracts. 2. True/False:...
True/False Questions 1. True/False: Thin filaments do not change length when a muscle contracts. 2. True/False: During aerobic respiration, glucose and oxygen are used to make ATP in the mitochondria. 3. True/False: Schwann cells wrap their processes around Central Nervous System axons to form myelin sheaths which function to increase the speed of action potentials. 4. True/False: The inside of a resting neuron is slightly negative relative to the outside of the cell. 5. True/False: The lens of the eye...
predict the product of the reaction below, why does the change in base and solvent matter?...
predict the product of the reaction below, why does the change in
base and solvent matter?
Br KOtBu HOtBu 449
Hi can someone help me with my pre lab theory questions (1,2,3)
on rate of elution or Rf? Here is some background below. Please
help explain as many as possible (1-3)! I dont really get the
relation ships in this lab, thank you!
1. What factors affect the rate of elution in organic compounds? 2. Explain what is the relationship between polarities of compounds (polar/non- polar compound) and rate of elution (Rf). 3. Explain what is the relationship between solvent...
36. True or False: In order to accomplish the same change in aggregate demand, the government will always need to increase spending more than a change a tax. a. True b. False 37. When the government increases taxes and government spending by the same amount a. The Ricardo-Barro effect predicts less savings and the government is still b. The government must increase the deficit to finance the spending and the c. There is no change in the government budget deficit...
Which of the following statements about an Svl mechanism is (are) true? 4. A. The reaction is fastest with 3° halides. B. The rate of the reaction increases when the solvent is changed from (CHs):C-O to CH&CH:OH C. The identity of the leaving group does not affect the reaction rate. D. Statements (The reaction is fastest with 3° halides) and (The rate of the reaction increases when the solvent is changed from (CHs):C-0 to CH CH OH) are true. E....
true/false:
1. the major product when p-ethylbenzoic acid is treated with
a mixture of concentrated nitric and sulfuric acids will be
4-ethyl-3-nitro-benzoic acid.
7.-10. multiple choice is pictured below
Multiple Choice 7. Which of the following will react with Cl2/AlCl3 at the fastest rate? Benzoic acid B. toluene C. bromobenzene D. anisole 8. Which of the following reagents will reduce p- nitrotoluene to p-methylaniline? A. W-K. B. H2Cr04 C. H2, Ni D. NBS, light 9. Which of the reagents in...
True/False Questions 1. True/False: Thin filaments do not change length when a muscle contracts. 2. True/False: During aerobic respiration, glucose and oxygen are used to make ATP in the mitochondria. 3. True/False: Schwann cells wrap their processes around Central Nervous System axons to form myelin sheaths which function to increase the speed of action potentials. 4. True/False: The inside of a resting neuron is slightly negative relative to the outside of the cell. 5. True/False: The lens of the eye...
predict the product of the reaction below, why does the change in
base and solvent matter?
Br KOtBu HOtBu 449
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