H2Se is a diprotic acid. What is the pH of a 0.10 M H2Se solution ? Kal = 1.3 x 10-4 and Ka2 = 1.0 x 10-ii O 4.89 O 5.50 O 2.44 O 3.89

Q: What is the calculated value of the cell potential at 298K for an electrochemical cell with the foll...

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Q: 6. Propose a route to Compound 2 from only bromobenzene and methyl formate as carbon sources, plus a...

A: Let us talk about the grignard reagent.  Here firstly the bromobenzene is used.  The we have to reac...

Q: 1) HCI (1 eq.) F) Br CI 2) HBr (1 еq) Major Minor Br G) ELOH Diene Dienophile CO,Me H) Нeat CO,Me AI...

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Q: A mixture of xenon and argon gas is expanded from a volume of 11.0 L to a volume of 63.0 L, while th...

A: Given :- initial volume of gas mixture = 11.0 L  Final volume of gas mixture = 63.0 L  Pressure = 59...

Q: 1. Write the formulas for the six ions that are always soluble:

A: Formulas for the six ions that are always soluble: 

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Q: Name of Experiment: Spectrophotometry of a two- component mixture: Determination of CO and Ni as EDT...

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Q: The dye has a percent composition of 75.95% C, 17.72% N, and 6.33% H by mass with a molar mass of ab...

A: % of C = 75.95 % of N = 17.72 % of H = 6.33 Molar mass of dye = 240 g/mol   The question requires to...

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Q: percent yield of carbon dioxide.

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Q: Choose the best buffer system to maintain the pH at 7.00. O Acid Z and NaZ, K, = 8.0 x 10-9 O None o...

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Q: What is the molarity of a solution of nitric acid if 0.216 g of barium hydroxide is required to neut...

A: 2HNO3(aq) + Ba(OH)2(aq) -----> Ba(NO3)2 +2H2O(l) Mass of Ba(OH)2 = 0.216 g Volume of HNO3 = 20 mL...

Q: A shell fossil that originally contained 100 mg of carbon-14 non contains 75 mg of the isotope. Dete...

A: Initial amount, [A]0 = 100 mg  Final amount, [A] = 75 mg  Half-life, t1/2 = 5570 years 

Q: Consider the following reaction: 2NOB. (g) + 2NO (g) + Br2 (g) The volume of a container with an equ...

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Q: NO2 Et3N N=C=0 Ph CO,Me Meo,c

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Q: Is there a difference when the needle or metal clip is placed on the surface of distilled water and ...

A: Yes, there is a difference when the needle or metal clip is placed on the surface of distilled water...

Q: Q1: |The results of a photoelectric experiment comparing two different metals (A ar B) are shown bel...

A: We would use equation of photoelectric effect to determine which metal has greater value of φ.

Q: Answer the following questions for each of the molecules given below: hae NH NH2 a) Provide the Lewi...

A: In compound CH3-CH=CH2, carbon in CH3 forms only single bonds and the orbitals involved are sp3 hybr...

Q: Question 7 Consider a spin-1/2 solid where the two energy levels are split by 25 GHz. (a) At a tempe...

A: Given:-

Q: Step by step please. also have to answer A-D

A: For the reaction., MnO4-(aq) + 5 Fe2+(aq) + 8 H+(aq)---> Mn2+(aq) + 5 Fe3+(aq) + 4 H2O (l)

Q: Using tne Bronstea-Lowry concept of acias ana bases, identiry the Brønstea-Lowry acid and base in ea...

A: Bronsted-Lowry does not define a substance as specifically an acid or a base; it defines reaction en...

Q: The decomposition of nitrogen dioxide gas (NO,) to nitrogen monoxide (NO) and oxygen(0,) gases is a ...

A: By applying second order rate kinetics, we can find rate constant.

Q: Calculate the percent ionization of HA in a 0.10 M solution. Express your answer to two significant ...

A: Given values-> Concentration of HA = 0.10M Ka = 1.6 × 10^-7    

Q: Which answer best fills in the blanks in the correct order? HF is a weak acid. Adding NaF to pure wa...

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Q: 1. Which of the ff. is NOT true for K? a. It is dimensionless. b. It is independent on temperature. ...

A: 1.) We would check all factors on which K ( equilibrium constant ) depends.    2) we would use relat...

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A: Reactant react with each other to produce a chemical species, called product.  Now, in reactant ther...

Q: ii) Insert the chart of IR spectrum of Ni(DMG)2 160 Precursor 140 120 100 80 60 40 4000 3500 3000 25...

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Q: Solid aluminum (Al)and oxygen (0,) gas react to form solid aluminum oxide (Al,0,). Suppose you have ...

A: Limiting reagent is the reagent which controls the reaction. When total amount of limiting reagent i...

Q: Consider the reaction 2NCI3 (e) A N2 (6) + 3CI2 (2) K,= 0.001 A set of equilibrium pressures are P(N...

A: Nitrogen trichloride decomposes into nitrogen gas and chlorine gas. The equation for the balanced ch...

Q: Calculate the formality and normality of a commercial solution of H2SO4 whose purity is 97% and its ...

A: 97% by weight of solution means 97 gram of H2SO4 in 100 gram of solution. Density of Solution = 1.82...

Q: What is the mass percent of P in H3PO4? Show your calculations please.

A: Percent mass of an element in a compound can be calculated by using the following formula:

Q: A solution that has a hydrogen ion concentration equal to 3.52 x 10-3 has a pH = _____________?

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Q: (iii) Use the equation below and data from the table to calculate a value for the C=C bond energy in...

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Q: Why does the presence of solute in a solution lower its freezing point?

A: Freezing point is the temperature at which a liquid freezes and the solid and liquid phases are in e...

Q: Determine the heat associated with a decrease in the temperature of 375g of water from 31.5°C to 24....

A: Heat associated with decreasing temperature is calculated using the equation,                       ...

Q: 2. Synthesis (use as many boxes as needed, excess are provided)

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Q: In separate titrations, equal volumes of 0.1 M HCl and 0.1 M HC2H3O2 (weak acid) are titrated with 0...

A: Acid-base titration is a volumetric titration that is based on neutralization reaction between acid ...

Q: According to collision theory, which of the following events must occur for a reaction to take place...

A: This question is related to collision theory. Collision theory is based on the assumption that the n...

Q: ections: Balance the chemical equation below and complete its mole ratio on the table below. _C3H8 C...

A: C3H8 + 5O2 ----> 3CO2 + 4H2O  

Q: 3. Calculate the kg/cmol for Ca*2 (review the calculations from Lab 1). If a soil can retain 25 cmol...

A: Answer and explanation is given below hope you like it.

Q: What is the pressure of the air, in atmatm, in the lungs when the gas expands to 150.0 mLmL at a bod...

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Q: 1. Write the structural formula of the major product(s) formed in each of the following reactions. S...

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Q: What is the name of the reducing monosaccharide found in the disaccharide shown here? но HO H HO OH ...

A: With one anomeric carbon unable to convert to the open-chain form (non-reducing end), only the free ...

Q: Write T if the statement is true and F it is false.

A: 5)  Typically, if we have pure product from a reaction, percent yields are understandably less than ...

Q: What is the calculated value of the cell potential at 298K for an electrochemical cell with the foll...

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Q: For each reaction shown, determine which substitution mechanism either SN1 or SN2 is likeliest to pr...

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Q: he pH of a solution containing 0.1 M of a weak acid HA is 6. Calculate Ka for this acid. a)1.0 x 1...

A: Answer - The correct option is (c)1.0 x 10-11