In an experiment, what happens to the calculated molar mass after waiting an hour between thawing the frozen cyclohexane and adding the unknown compound, during which time some of the cyclohexane evaporated.   Will the molar mass be too large, too small, or unaffected?  Explain.

Q: The enzyme urease is widely used for determining urea concentration in blood. The Michaelis constant…

A: Given Values: Km=2 mMk2=2.8×104 s-1V=3.49 M/secET=0.34 mM = 0.34×10-3 M

Q: Hypoglycin A, an amino acid derivative found in unripened lychee, is an acutely toxic compound that…

A: There are 20 different amino acids that exist in nature. They are involved in forming the protein…

Q: (a) Cholesterol isolated from natural sources is enantiopure. The observed rotation of a 0.3-g…

A: Cholesterol and many other molecules occur in two forms depending upon the rotation around the plane…

Q: Biotin (below), also known as Vitamin B7, is a very large organic compound derived primarily from…

A: Vitamin B7 or biotin's empirical formula is C10H16O3N2. It is widespread in foods and also produced…

Q: The dissociation constant, Kd for a complex between protein A and protein B is 4.1 μM. If the two…

A: The equilibrium association between proteins A & B to form AB and the dissociation of AB to give…

Q: ketch a titration curve and the structures of the major ionic forms of glutamic acid that exist in…

A: The proteins are composed of twenty naturally occurring amino acids connected via peptide bonds.The…

Q: consider pyruvic acid with Ka = 1.4x10^-4. what initial molarity of pyruvic acid would be needed to…

A: The acid dissociation of pyruvic acid can be written asCH3​COCOOH(aq)→CH3​COCOO−(aq)+H+(aq) GivenpH…

Q: ou have given two proteins with a pI of 4.5 and pI of 7.7? Using an anion-exchange column, how can…

A: Ion-exchange chromatography: The method involves the separation of ions and polar molecules based…

Q: Soy milk is rich in vegetable protein (about 4.5 grams of protein per 100 grams of soy milk) and…

A: INTRODUCTION : Proteins : Proteins are simple & complex biocompounds which are needed by the…

Q: If glucose, phosphate, and glucose-6-phosphate arecombined in concentrations of 4.8, 4.8, and 0.25…

A: Glucose is converted to glucose-6-phosphate by hexokinase in the first step of glycolysis. The…

Q: Please provide a chromatography technique to isolate the protein A from the mixture containing…

A: Chromatography is the technique used for the separation of molecules or analytes from the mixture by…

Q: What is the final concentration if 239mL of a 3.9M glucose solution is diluted to a volume of 842mL?

A: To solve this we will use the formula - M1xV1= M2xV2

Q: 80mL of a 0.3M solution of hexapeptide Leu-His-Cys-Glu-Asn-Arg is adjusted to pH=pI. The solution is…

A: Proteins are unbranched polymers constructed from 20 standard α-amino acids. They have four levels…

Q: A colleague has successfully purified the enzyme sphingomyelinase from bovine brain. She provides…

A: Protein purification is the isolation and concentration of the desired protein from a crude cell…

Q: Acetone, CH3–(C=0) –CH3, and urea, NH2–(C=0)–NH2, have similar chemical structures. (a) Compare the…

A: Acetone, CH3–(C=0) –CH3 - it is an organic solvents which unfolds the protein by interfering the…

Q: If a pediatric vitamin contains 1500 units of vitamin A per milliliter of solution, how many units…

A: A vital nutrient that is fat-soluble and plays a role in many bodily processes is vitamin A.It is…

Q: pSr value of a 50.00 mL solution of 0.01000 M Sr2+

A:

Q: What is the molarity of a solution with 100 g fructose dissolved in 0.7 L water?

A: Fructose is a carbohydrate or a sugar molecule and is a monosaccharide. It is found mostly in…

Q: 1.0.1 mL of a protein solution of concentration of 11 mg/mL was diluted to a total volume of 4.0 mL…

A: The four types of biological macromolecules are nucleic acids proteins lipids and carbohydrates.…

Q: An enzyme (molecular weight= 24 kDa, pI= 5.5) is contaminated with two other proteins, one with a…

A: Mixture of an enzyme and two contaminated protein has to be separate to purify the enzyme. For the…

Q: Glucose-1-phosphate has a ΔG°′ value of −20.9 kJ/mol, whereas that for glucose-6-phosphate is −12.5…

A: Glucose 6 phosphate is the first intermediate of glycolysis. Glucose-1-phosphate is formed by the…

Q: a) Electrospray ionization of this small protein typically results in major charge states of +8, +9,…

A: Mass of ubiquitin = 8560 Da. In proteins and peptides, mass spectrum comprises of series of peaks,…

Q: Casein, a protein in milk, has a molecular formula C38H57O9N9. Determine the total BOD, carbonaceous…

A: Microorganisms are critical to the BOD test because they are the primary agents responsible for the…

Q: 80mL of a 0.3M solution of hexapeptide Leu-His-Cys-Glu-Asn-Arg is adjusted to pH=pl. The solution is…

A: Proteins are unbranched polymers constructed from 20 standard α-amino acids. They have four levels…

Q: pH =

A: The base dissociation constant (Kb) is a measure of the strength of a base. The negative logarithm…

Q: After staining an SDS-PAGE gel with Coomassie Blue G-250, the protein bands are visualized by…

A: Protein purification is the process in which a protein or a number of proteins are separated or…

Q: Calculate the number of milliliters (mL) of a solution which contains 16 g of BaCl2 per liter which…

A: Introduction Amount of sulfur=12% in 0.60g=12100×0.6=0.072gMolar mass of BaCl2=208.23g/molatomic…

Q: From these data, describe the native protein,  in terms of the kinds of subunits present, the…

A: Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) is a technique to separate…

Q: Phosphate buffered saline (PBS) is a physiological buffer often used in biology experiments. Because…

A: The term that is used to define the amount of a substance present in a solution is called…

Q: Concanavalin (ConA) is a 25.5KDa protein with pl of 4.7 and optical absorbance (A 0.1% 289) of 1.14.…

A: Proteins are polymers of amino acids with specific molecular weight and pI (isoelectric point, pH at…

Q: 0.9% (m/v) NaCI solution and 5% (m/v) glucose solution are both isotonic to red blood cells. SHOW…

A: Osmolarity is the number of solutes present per litre of the solution.  Tonicity is the capability…