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UUUUUUU MICRONG SUIC LUGN YUui listructor. 1. Suppose the material that you are recrystallizing fails to...
The probability that a patient fails to recover from a particular operation is 0.2. suppose that...
The probability that a patient fails to recover from a particular operation is 0.2. suppose that seven patients having this operation are selected at random. What is the probability that exactly three patients will not recover? what is the probability that all patients will recover?
Answer the following before coming to lab: 1.) Based on what you saw last week, which...
Answer the following before coming to lab: 1.) Based on what you saw last week, which enantiomer of tartaric acid would you expect to co- crystallize with (SS)-1,2-diammoniumcyclohexane? 2.) If you had a neutral aqueous solution of triethylamine, would you add acid or base in order to extract it with an organic solvent? 3.) Now, consider a dichloromethane solution of triethylamine. Would you extract with acidic aqueous or basic aqueous solution in order to get the triethylamine out of the...
please answer all parts I am trying to check my answers. Recrystallization of Acetanilide Recrystallization is...
please answer all parts I am trying to check my
answers.
Recrystallization of Acetanilide Recrystallization is an important method used by chemists to purify solid compounds. When a chemist conducts a chemical reaction as shown in Scheme 1, it will rarely go to 100% completion, and will frequently produce byproducts. These byproducts and some of the unreacted starting materials will be present in the end as impurities. Chemists need ways to remove these unwanted impurities so they can isolate their...
Suppose you made a "baggie" out of dialysis tubing (a material that mimics a cell membrane),...
Suppose you made a "baggie" out of dialysis tubing (a material that mimics a cell membrane), filled the baggie with 25% salt water, and then submerged the baggie in a beaker of DI water. Over time, would you expect the baggie to gain weight or lose weight (CHOOSE ONE)? WHY do you think this (your answer) will happen?
Suppose that your air conditioner fails on Sunday at midnight (t0 = 0), and you cannot...
Suppose that your air conditioner fails on Sunday at midnight (t0 = 0), and you cannot afford to have it repaired until payday at the end of the month. Assume that the outside temperature varies according to the function A(t) = 80 5 cos(π/12)-5√3sin(π/12t) and that your inside temperature, u(t) obeys Newton’s law of cooling and is governed by the differential equation du/dt= -0.2(u-A(t)) (a) If your indoor temperature when the air conditioner failed was 70◦F , determine the dynamics...
suppose you measure the density of a material and find it to be 3.1 g/cm3 with...
suppose you measure the density of a material and find it to be 3.1 g/cm3 with an uncertainty of 0.1 g/cm3. (The uncertainty may arise from an uncertainty built into the scale. From this measurement, what can you claim about the identify of the material?
POST LAB QUESTIONS-USE GOOGLE SCHOLAR TO HELP FIND THE ANSWERS 1) How would you pick the good sol...
POST LAB QUESTIONS-USE GOOGLE SCHOLAR TO HELP FIND THE ANSWERS 1) How would you pick the good solvent for the recrystallization of your chemical? 2) List ten solvents used mostly for recrystallization. Provide in the table physical properties for these solvents that help choosing the best solvent. 3) Why do we use a very cold solvent to wash crystals? 4) Why is it preferable to use vacuum filtration and not regular one for recrystallization?
POST LAB QUESTIONS-USE GOOGLE SCHOLAR TO...
A. Recrystallization is an important technique that we used in this lab to purify solids. Answer...
A. Recrystallization is an important technique that we used in this lab to purify solids. Answer the following questions related to this technique, which is outlined in the diagram below. (2 pts. each) Watch ass Watch Glass Hot solvent Insoluble mpurities Dissolve the compound Continue heating if necessary hot solvent Fluted fiter paper Continue heating until half of the solvent is evaporated Vacuum filtration Allowed to cool to room temperature then put in an ice bath HOT Gravity filtration 3....
Questions 1. Suppose that you are performing an extract solvent that has a density less than...
Questions 1. Suppose that you are performing an extract solvent that has a density less than water. Propos the organic solvent. Assume that water and your son extraction of an aqueous solution with an organic Fropose a method to identify and collect only and your solvent of interest are not miscible. the dichloromethane?
Cold Press Products produces a product with the following costs as of My 1, 2015 Material...
Cold Press Products produces a product with the following costs as of My 1, 2015 Material Labor Overhead Beginning inventory at these costs on July I was 9.000 units. From July I to December 1, Cold Press produced 11.000 units. These units had a material cost of 56 per unit. The costs for labor and overhead were the same Coll Press uses FIFO m arya Assuming the Cold Press sold 15.000 units during the last six months of the year...
Answer the following before coming to lab: 1.) Based on what you saw last week, which enantiomer of tartaric acid would you expect to co- crystallize with (SS)-1,2-diammoniumcyclohexane? 2.) If you had a neutral aqueous solution of triethylamine, would you add acid or base in order to extract it with an organic solvent? 3.) Now, consider a dichloromethane solution of triethylamine. Would you extract with acidic aqueous or basic aqueous solution in order to get the triethylamine out of the...
please answer all parts I am trying to check my
answers.
Recrystallization of Acetanilide Recrystallization is an important method used by chemists to purify solid compounds. When a chemist conducts a chemical reaction as shown in Scheme 1, it will rarely go to 100% completion, and will frequently produce byproducts. These byproducts and some of the unreacted starting materials will be present in the end as impurities. Chemists need ways to remove these unwanted impurities so they can isolate their...
Suppose you made a "baggie" out of dialysis tubing (a material that mimics a cell membrane), filled the baggie with 25% salt water, and then submerged the baggie in a beaker of DI water. Over time, would you expect the baggie to gain weight or lose weight (CHOOSE ONE)? WHY do you think this (your answer) will happen?
POST LAB QUESTIONS-USE GOOGLE SCHOLAR TO HELP FIND THE ANSWERS 1) How would you pick the good solvent for the recrystallization of your chemical? 2) List ten solvents used mostly for recrystallization. Provide in the table physical properties for these solvents that help choosing the best solvent. 3) Why do we use a very cold solvent to wash crystals? 4) Why is it preferable to use vacuum filtration and not regular one for recrystallization?
POST LAB QUESTIONS-USE GOOGLE SCHOLAR TO...
A. Recrystallization is an important technique that we used in this lab to purify solids. Answer the following questions related to this technique, which is outlined in the diagram below. (2 pts. each) Watch ass Watch Glass Hot solvent Insoluble mpurities Dissolve the compound Continue heating if necessary hot solvent Fluted fiter paper Continue heating until half of the solvent is evaporated Vacuum filtration Allowed to cool to room temperature then put in an ice bath HOT Gravity filtration 3....
Questions 1. Suppose that you are performing an extract solvent that has a density less than water. Propos the organic solvent. Assume that water and your son extraction of an aqueous solution with an organic Fropose a method to identify and collect only and your solvent of interest are not miscible. the dichloromethane?
Cold Press Products produces a product with the following costs as of My 1, 2015 Material Labor Overhead Beginning inventory at these costs on July I was 9.000 units. From July I to December 1, Cold Press produced 11.000 units. These units had a material cost of 56 per unit. The costs for labor and overhead were the same Coll Press uses FIFO m arya Assuming the Cold Press sold 15.000 units during the last six months of the year...
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