Homework Answers
mass of reactant = 3.8g
moles of reactant = mass/molecular weight = 3.8 / 130g/mol = 0.0292 mol
mass of product = moles of methyl(S)-,methyl- 4- oxo butanoate * mol mass of product = 0.0292 * 188
theoritical yield = 5.489 g
theoritical yield = 5489 mg
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Question #15: Using the molecular weight (130 g/mol) of methyl (S)-2-methyl-4-oxobutanoate calculated earlier (3.8) and the...
After purification, this reaction yielded 5.6 g of product Question #20: Using the mmoles of benzene calculated e...
After purification, this reaction yielded 5.6 g of product Question #20: Using the mmoles of benzene calculated earlier (55.8) and the molecular weight of the product (123 g/mol) predict the theoretical 100 % yield of the product in grams. Round to the tenths place. 6.9 Question #21: Using this number predict the experimental yield (reminder, the reaction produced 5.6 g of product.) Round to the nearest whole number.
After mixing for three hours, the product is extracted into Dichloromethane and the solvent is removed...
After mixing for three hours, the product is extracted into Dichloromethane and the solvent is removed to give 5.5 g of a yellow oil. Question #31: Using the mmoles of nitrobenzene calculated earlier (45.5) and the molecular weight of the product (157.5 g/mol) predict the theoretical 100% yield of the product in grams. Round to the hundredths place. Question #32: Using this number predict the experimental yield (reminder, the reaction produced 5.5 g of product.) Round to the nearest whole...
Chapter 15, Practice Problem 15.17 The tensile strength and number-average molecular weight for two poly(methyl methacrylate)...
Chapter 15, Practice Problem 15.17 The tensile strength and number-average molecular weight for two poly(methyl methacrylate) materials are as follows: Tensile Strength (MPa) Number-Average Molecular Weight (g/mol) 52 30,000 130 50,000 Estimate the tensile strength at a number-average molecular weight of 37,000 g/mol. 247 MPa the tolerance is +/-3% Click if you would like to Show Work for this question: Open Show Work
i dont understand why the molecular weight i calculated (42.012 g/mol) for my unknown liquid (acetone)...
i dont understand why the molecular weight i calculated
(42.012 g/mol) for my unknown liquid (acetone) is less than the
actual molecular weight (58.08 g/mol). what errors could i have
made in my lab that would account for the difference.
Molecular Weight of a Volatile Liquid In this experiment, an amount of liquid more than sufficient to fill the flask when vaporized is placed in a flask of measured volume and mass. The flask is then heated in a boiling...
Problen 1 1. For production of penicillin (CIGHsO4N S, molecular weight 334.4 g/mol), glucose CoHr2O) is...
Problen 1 1. For production of penicillin (CIGHsO4N S, molecular weight 334.4 g/mol), glucose CoHr2O) is used as substrate and phenylacetic acid (C H O2) is added as precursor. The stoichiometry for overall synthesis is: A supply of 100 mol/hr of glucose is fed to a continuous stirred-tank reactor for the production of penicillin, along with 200 mol/hr of ammonia (NHs),130 mol/hr of oxygen, 125 mol/hr of sulfuric acid and 100 mol/hr of phenylacetic acid. a. Determine the limiting reactant...
using the procedure above complete the stoichiometry table Procedure In an oven-dried, 100 ml round bottom...
using the procedure above complete the stoichiometry
table
Procedure In an oven-dried, 100 ml round bottom flask containing magnetic stirring bar was added hydrobenzoin (1.0 8.4.7 mmol), anhydrous iron(III) chloride (0.3 g, 1.8 mmol), and anhydrous acetone (30 ml). The mixture was heated to reflux and stirred for 30 min. The reaction mixture was cooled tort and transferred to a separatory funnel containing 10% aq potassium carbonate (10 mL). Water (50 mL) was added and the aqueous solution was extracted...
Name: Date: Separation of Acid/Base/Neutral compounds using liquid-liquid extraction OCH CHO HN Benzocaine Molecular Weight: 165.19...
Name: Date: Separation of Acid/Base/Neutral compounds using liquid-liquid extraction OCH CHO HN Benzocaine Molecular Weight: 165.19 Melting Point: 88-90 °C 1,1-biphenyl Molecular Weight: 154.21 Melting Point: 68-70 °C trans-cinnamic acid Molecular Weight: 148.16 Melting Point: 132-135 °C Question 1: Identify the following compounds as Acid, Base or Neutral. (2 points) a. Benzocaine: b. Biphenyl: c. Trans-cinnamic acid: (2 points) _ (2 points) Question 2: Draw the structure in the box (5 points each): NaOH OCH,CH, HCM NaOHA HC form. Ples...
Experiment 8 Conservation of Mass kussion: action: 170 Mole wt. g/mol Aqual the combined masses of...
Experiment 8 Conservation of Mass kussion: action: 170 Mole wt. g/mol Aqual the combined masses of all the reactants that were initially present. Furthermore, we fter any chemical reaction, the total mass of new products and any left over reactants) will a predict the mass of each product that will be formed if we know the molecular weight or the formula (from which we can predict the molecular weight). As an example, consider the dissolve the two substances in water,...
PROCEDURE CAUTION!!! Nitric acid and sulfuric acid are strong and corrosive acids. For that reason, avoid...
PROCEDURE CAUTION!!! Nitric acid and sulfuric acid are strong and corrosive acids. For that reason, avoid inhaling its vapors or causing any contact with the skin or clothing. Wear your protective glasses at all times. Use the extractors to work with these acids. A. Nitration of methyl benzoate 1. Preparation of the reactants. In the extractor you will find a burette with concentrated sulfuric acid, a second burette with concentrated nitric acid, clearly identified. Familiarize yourself with the scales of...
Using your answer to question 10 part a, calculate the theoretical amount (in mg) that was...
Using your answer to question 10 part a, calculate the
theoretical amount (in mg) that was expected for the
p-methyl acetanilide product. Be sure to show your
work.
10a: 37.9 x 17.5 / 100 = 6.6325mmol
Reaction 2: Reduction NO2 NH4HCO2 NH2 + NO2 Pd/C NO2 NH2 NH2 m-methylaniline p-methylaniline 0-methylaniline ortho meta para Procedure for Reaction 2: 1) The mixture of ortho, meta, and para isomers obtained from reaction 1 (2.4 g, 17.5 mmoles) was added to a 50...
After purification, this reaction yielded 5.6 g of product Question #20: Using the mmoles of benzene calculated earlier (55.8) and the molecular weight of the product (123 g/mol) predict the theoretical 100 % yield of the product in grams. Round to the tenths place. 6.9 Question #21: Using this number predict the experimental yield (reminder, the reaction produced 5.6 g of product.) Round to the nearest whole number.
After mixing for three hours, the product is extracted into Dichloromethane and the solvent is removed to give 5.5 g of a yellow oil. Question #31: Using the mmoles of nitrobenzene calculated earlier (45.5) and the molecular weight of the product (157.5 g/mol) predict the theoretical 100% yield of the product in grams. Round to the hundredths place. Question #32: Using this number predict the experimental yield (reminder, the reaction produced 5.5 g of product.) Round to the nearest whole...
Chapter 15, Practice Problem 15.17 The tensile strength and number-average molecular weight for two poly(methyl methacrylate) materials are as follows: Tensile Strength (MPa) Number-Average Molecular Weight (g/mol) 52 30,000 130 50,000 Estimate the tensile strength at a number-average molecular weight of 37,000 g/mol. 247 MPa the tolerance is +/-3% Click if you would like to Show Work for this question: Open Show Work
i dont understand why the molecular weight i calculated
(42.012 g/mol) for my unknown liquid (acetone) is less than the
actual molecular weight (58.08 g/mol). what errors could i have
made in my lab that would account for the difference.
Molecular Weight of a Volatile Liquid In this experiment, an amount of liquid more than sufficient to fill the flask when vaporized is placed in a flask of measured volume and mass. The flask is then heated in a boiling...
Problen 1 1. For production of penicillin (CIGHsO4N S, molecular weight 334.4 g/mol), glucose CoHr2O) is used as substrate and phenylacetic acid (C H O2) is added as precursor. The stoichiometry for overall synthesis is: A supply of 100 mol/hr of glucose is fed to a continuous stirred-tank reactor for the production of penicillin, along with 200 mol/hr of ammonia (NHs),130 mol/hr of oxygen, 125 mol/hr of sulfuric acid and 100 mol/hr of phenylacetic acid. a. Determine the limiting reactant...
using the procedure above complete the stoichiometry
table
Procedure In an oven-dried, 100 ml round bottom flask containing magnetic stirring bar was added hydrobenzoin (1.0 8.4.7 mmol), anhydrous iron(III) chloride (0.3 g, 1.8 mmol), and anhydrous acetone (30 ml). The mixture was heated to reflux and stirred for 30 min. The reaction mixture was cooled tort and transferred to a separatory funnel containing 10% aq potassium carbonate (10 mL). Water (50 mL) was added and the aqueous solution was extracted...
Name: Date: Separation of Acid/Base/Neutral compounds using liquid-liquid extraction OCH CHO HN Benzocaine Molecular Weight: 165.19 Melting Point: 88-90 °C 1,1-biphenyl Molecular Weight: 154.21 Melting Point: 68-70 °C trans-cinnamic acid Molecular Weight: 148.16 Melting Point: 132-135 °C Question 1: Identify the following compounds as Acid, Base or Neutral. (2 points) a. Benzocaine: b. Biphenyl: c. Trans-cinnamic acid: (2 points) _ (2 points) Question 2: Draw the structure in the box (5 points each): NaOH OCH,CH, HCM NaOHA HC form. Ples...
Experiment 8 Conservation of Mass kussion: action: 170 Mole wt. g/mol Aqual the combined masses of all the reactants that were initially present. Furthermore, we fter any chemical reaction, the total mass of new products and any left over reactants) will a predict the mass of each product that will be formed if we know the molecular weight or the formula (from which we can predict the molecular weight). As an example, consider the dissolve the two substances in water,...
PROCEDURE CAUTION!!! Nitric acid and sulfuric acid are strong and corrosive acids. For that reason, avoid inhaling its vapors or causing any contact with the skin or clothing. Wear your protective glasses at all times. Use the extractors to work with these acids. A. Nitration of methyl benzoate 1. Preparation of the reactants. In the extractor you will find a burette with concentrated sulfuric acid, a second burette with concentrated nitric acid, clearly identified. Familiarize yourself with the scales of...
Using your answer to question 10 part a, calculate the
theoretical amount (in mg) that was expected for the
p-methyl acetanilide product. Be sure to show your
work.
10a: 37.9 x 17.5 / 100 = 6.6325mmol
Reaction 2: Reduction NO2 NH4HCO2 NH2 + NO2 Pd/C NO2 NH2 NH2 m-methylaniline p-methylaniline 0-methylaniline ortho meta para Procedure for Reaction 2: 1) The mixture of ortho, meta, and para isomers obtained from reaction 1 (2.4 g, 17.5 mmoles) was added to a 50...
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