In biological systems, buffers are important because they facilitate changes in pH to enhance biological activities of proteins and nucleic acids. True O False

Q: Water is amphoteric which means that it can either act as a Bronsted-Lowry acid or base. In the give...

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Q: What volume of 0.220 M HBr solution is required to produce 0.0190 moles of HBr? Answer should be in...

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Q: n this experiment, we will be making waste aluminum into Q: 1 Eelect one: Aluminum foil to use in ot...

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Q: What is the molar mass of magnesium phosphate. **Be sure to select answer with the correct units!! ...

A: Molar mass is the sum total of masses of atom each element in a molecule. It is the mass of 1 mol of...

Q: How many enantiomeric pairs are possible for an aldohexose? O 8 O 2 O 16

A: In a aldehecoses there are 4 chairal carbon. The general rule for enetiomer is 2n-1,where n is no of...

Q: Glu is first, His is second, and Arg is last to elute from the column.

A: In this question we have to choose Correct option of the separate Glu, Arg and His using a cation - ...

Q: Using dimensional analysis How many grams of potassium chloride are produced if 25 grams of potassiu...

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Q: titration reactions, what do you call the chemicals where the concentrations is unknown? Select one:...

A: Titration can be defined as the volumetric analysis for determination of  the concentration of a sub...

Q: Use the literature value of Keq = 130 to answer this question. A solution is prepared by combining 4...

A: (a)   Millimoles of Fe(NO3)3  =Molar concentration of Fe(NO3)3×Volume of Fe(NO3)3  =0.0500 M×4.00 mL...

Q: what are the four major categories organic molecules and give an example of each?

A: Organic compounds is mainly made up of carbon and hydrogen contains heteratoms like nitrogen, oxygen...

Q: -5 Calculate the volume in liters of a 7.21 x 10 °uM zinc oxalate solution that contains 200. g of z...

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Q: Question 5 What are the components of the buffer solution when 0.20 mol H3PO4 is made to react with ...

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Q: stearic acid triple pressed

A: In this question we have to explain about the stearic acid triple pressed, why cream is thicker and ...

Q: Which of the following is a galvanic cell? a.Cu(s)|Cu2+(aq)||Cl-(aq)|AgCl(s)|Ag(s) b.Pt(s)|Ce3+(aq)...

A: Answer of first part, Please post your question for 2 nd part and mention it

Q: DDT, an insecticide harmful to fish, birds, and humans, is produced by the following reaction: 2C6 H...

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Q: What is the pH and pOH of the ff. a. 0.050 mol Hcl in 700 mL of water b. 3.50 mol of milk of magnesi...

A: pH of a solution is defined as the negative logarithm of hydrogen ion concentration.    pH = -log[H+...

Q: Which is a D-sugar?

A: All naturally  occurring  sugars  are D sugars  They all have basic unit D glyceradehyde. In the str...

Q: 3. When do you use gravity filtration? When do you use vacuum filtration?

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any ...

Q: A. Rounding Off A.1 Rounding A student rounded off the following calculator displays to three signif...

A: Rules for significant figure  All non zero integer are significant  Exact number have unlimited numb...

Q: The pH of a solution containing a hydrogen ion concentration of 1 x 10-5 is:  A. 3 and its pOH is 6...

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Q: What will happen if the partial pressure of water at the pan temperature exceeds the partial pressur...

A: State change of a liquid depends on temperature and this temperature depends on the pressure of the ...

Q: The trisaccharide shown below can be found in beans, cabbage, brussels sprouts, broccoli, asparagus,...

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Q: A chemist must dilute 51.9 mL of 65.6 uM aqueous mercury(II) iodide (Hgl,) solution until the concen...

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Q: How many atoms does a simple cubic cell contains? Select one: a. 2 atoms b. 3 atom c. 4 atoms d. 1 a...

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Q: I. Define the following terms: g. Cream h. Lotion i. Cleansing and cold cream

A: A colloid is a mixture is two or more substances mixed together but not chemically combined  They ar...

Q: . Choose the item that correctiy describes the oxidizing agent and the reducing agent in the reactio...

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Q: What are the components of the buffer solution when 0.20 mol H3PO4 is mixed with 0.30 mol of the bas...

A: Given statement is :  What are the components of the buffer solution when 0.20 mole H3PO4 is mixed w...

Q: What is the pH of the solution given the following information? Methyl orange = yellow Methyl red = ...

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Q: compound C?

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Q: 3H2 (s) + N2 (g) --> 2NH3 (s) (balanced) When 19 grams of nitrogen react, the actual yield is 10.5 ...

A: 3H2 (s) + N2 (g) --> 2NH3 (s) (balanced)From the equation  1 mole N2  = 28 gm of N2  produce =2 m...

Q: Determine the limiting reactant: Ba(OH)2 (aq) + 2HCl (aq) --> 2H2O (l) + BaCl2 (aq) (balanced) 500...

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Q: A compound contains 42.9% C, 2.4 % H,  16.6% N and 38.1% O. The addition of 3.16 g of this compound ...

A: Here the given unknown compound contains 42.9%C, 2?4% H ,16.6% N and 38.1% O . We have to find molec...

Q: Using demensional analysis if 10.0 gram of aluminum chloride are decomposed, how many molecules of C...

A: First of all calculate the moles of Cl2 produced from the given mass of AlCl3 by using the balanced ...

Q: Your task is to categorize and tabulate the 20 standard amino acids with the following columns:

A: Amino acid are the building block of protein which contain both acidic COOH and basic NH2 group 

Q: In diluting acid solution, which of the following statements are correct? I. Add the acid into disti...

A: When water is added to acid, a concentrated solution of acid is formed in the starting and it's an e...

Q: est tube #1: distilled water + animal oil =  Test tube #2: distilled water + plant oil = Test tube #...

A: solution shown below.

Q: What is the freezing point of a solution in which 20.0 grams of sucrose (C12H22O12) is dissolved in ...

A: When a non volatile solute is dissolved in a solvent, the freezing point of the solution decreases k...

Q: 21-30. 9.0 L of a gas is found to exert 83.0 kPa at 35.0°C. What would be the required temperature (...

A: 21-30 : V = 9 L(constant) P1 = 83.0 kPa T1 = 35oC = 308 K P2 = 101.325 kPa or 1 atm 31-40 : V1 = 4 L...

Q: Which structure is a portion of 1. chitin 2. glycogen 3. Dextran 4. Cellulose? IN-, 1. B 2. A 3. D 4...

A: the solution is shown below.

Q: The OH concentration in an aqueous solution at 25 °C is 7.9 x 10-3. What is [H]?

A: pH of a solution measures acidity or basicity of solution. pH less than 7 indicates solution is acid...

Q: Which of the following is the correct glycosidic bond linkage of the disaccharide shown? он но но он...

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Q: Question 27 он CHOH он CHOH HO I ACNH II OH он CH3 HO HO III но

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Q: What is the freezing point of a solution in which 20.0 grams of sucrose (C12H22O12) is dissolved in ...

A: Given, mass of sucrose = 20.0 grams Molar mass of sucrose = 342.3 g/mol Mass of solvent = 400 grams ...

Q: Define the following terms: a. Humectant b. Emollient c. Occlusive d. Skin Rejuvenator e. Ceram...

A: a) Humectant - Humectant is a substance that promotes retention of moisture. Humectants are hydrosc...

Q: How many of the following nam a. 3,4-dimethylpentane b. 3,6,8-trimethyldecane 4-ethyl-6-methyloctane...

A: As per our company guidelines we are supposed to answer only first 3 sub-parts. Kindly post other pa...

Q: What mass of concentrated sulfuric  ( a 95% solution of H2SO4 by mas) is needed to prepare 500. g of...

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Q: Flammable liquids burn only when their vapor is mixed with air in the appropriate concentration. Whe...

A: Question 3  Flammable liquids catches fire when their vapours are mixed with air.  Several precautio...

Q: The heat of vaporization of hexane is 30.8 kJ. mol-1. The boiling point of hexane at a pressure of 1...

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Q: Acrylonitrile (C3 H3N) is the starting material for many synthetic carpets and fabrics. It is produc...

A: First we have to determine the limiting reagent. Limiting reagent is that which consumed first or fi...

Q: Cellulose is a polysaccharide consisting of a linear chain of several hundred to many thousands of B...

A: Cellulose is an organic compound and polysaccharide of glucose units. The chemical formula for cellu...