4. Two engineers are serving as trainees in a laboratory of a pharmaceutical company. One of their tasks involves determining the identity of a vitamin they were given by using any equipment or method at their disposal. As a hint, their supervisor gave them a list of possible candidates for the vitamins identity which includes: Vitamin Molecular Formula C20 H23 N,07 C3HNO3 C,H,N½O C17H29N406 Folinic Acid Pyridoxine Niacinamide Riboflavin To identify the vitamins identity, the two trainees separated their sample into two equal portions and performed two separate tests: [a.] Engr. Mayo used the flame atomic absorption spectrophotometer in order to identify the elemental composition of the sample which happens to be 59.0% C, 5.0% H and 22.9% N by mass [b.] Engr. Busog on the other hand mixed his 3.88 g sample with 30.0 mL of nitrobenzene, CGH5NO2 (Latent Heat of Fusion = 79.81 J/g). Using Beckmann's method, he determined the freezing point depression to be 7.1 deg C. Based on the tests performed, what is the identity of the vitamin sample?

4. Two engineers are serving as trainees in a laboratory of a pharmaceutical company. One of their tasks involves determining the identity of a vitamin they were given by using any equipment or method at their disposal. As a hint, their supervisor gave them a list of possible candidates for the vitamins identity which includes: Vitamin Molecular Formula C20 H23 N,07 C3HNO3 C,H,N½O C17H29N406 Folinic Acid Pyridoxine Niacinamide Riboflavin To identify the vitamins identity, the two trainees separated their sample into two equal portions and performed two separate tests: [a.] Engr. Mayo used the flame atomic absorption spectrophotometer in order to identify the elemental composition of the sample which happens to be 59.0% C, 5.0% H and 22.9% N by mass [b.] Engr. Busog on the other hand mixed his 3.88 g sample with 30.0 mL of nitrobenzene, CGH5NO2 (Latent Heat of Fusion = 79.81 J/g). Using Beckmann's method, he determined the freezing point depression to be 7.1 deg C. Based on the tests performed, what is the identity of the vitamin sample?

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter13: The Chemistry Of Solutes And Solutions

Section: Chapter Questions

Problem 57QRT

See similar textbooks

Similar questions

A sample of an organic compound (a nonelectrolyte) weighing 1.35 g lowered the freezing point of 10.0 of benzene by 3.66 C. Calculate the molar mass of the compound.
87. What volume of 0.151 N NaOH is required to neutralize 24.2 mL of 0.125 N H2SO4? What volume of 0.151 N NaOH is required to neutralize 24.2 n1L of 0.125 M H2SO4?
A human body contains approximately 5 L of blood. A bipolar disorder patient receives 2.0 g lithium carbonate as a daily dose. Calculate the concentration of Li+ (mmol/L) that this dosage provides.
What is the mass of fish, in kilograms, that one would have to consume to obtain a fatal dose of mercury, if the fish contains 30 parts per million of mercury by weight? (Assume that all the mercury from the fish ends up as mercury (II) chloride in the body and that a fatal dose is 0.20 g of HgCl2.) How many pounds of fish is this?
Ezetimibe (C_{24}H_{21}F_2NO_3) is a drug used to treat high blood cholesterol. Which of the following statements is correct?
A soft drink contains 11.5%% sucrose (C12H22O11C12H22O11) by mass. How much sucrose, in grams, is contained in 355 mLmL (12 ozoz) of the soft drink? (Assume a density of 1.04 g/mLg/mL.)
. Determine the % composition of Vitamin E, C29H50O2?
Discuss the advantages and disadvantages of using chlorine as disinfectant.
Give 5 examples of organic compounds in the household which changes in the same way as sugar and benzoic acid when heated.
when drawing melting point composition diagram for a mixture of something such as cinnamic acid and urea comparing melting point vs composition for organic chemistry, if i have three different compositions (1:4, 4:1,1:1) should i have 3 different graphs or would this all be on the same graph? and how do i convert grams to moles for example for composition 1:4 my data was 0.8003 g : 3.1917 g?
Give 5 examples of any organic compound which changes in the same way as sugar and benzoic acid when heated.
Complete the following table for citric acid, C6H8O7 , the acid found in many citrus fruits.