The ionization constant Ka, for HCN(aq) is 4.3 x 10^-10. What is the pH of a 0.22 molar solution of sodium cyanide, which contains the cyanide ion?

Q: A buffer solution is prepared by taking 0.438 moles of acetic acid (pKa=3.45) and 0.736 moles of sod...

A: We have to predict the pH of the solution.  

Q: Which arrow-pushing mechanism best explains activation of acetyl chloride for Friedel-Crafts acylati...

A: The arrow pushing mechanism that best explains the activation of acetyl chloride for friedal crafts ...

Q: A chemist titrates 180.0 mL of a 0.4289M pyridine (CH,N) solution with 0.5274M HCI solution at 25 °C...

A: Given,  [C5H5N] = 0.4289 M  Volume of C5H5N in mL = 180.0 mL  [HCl] = 0.5274 M  pKb of C5H5N = 8.77 ...

Q: Acetic acid: ka= 1.75x10$ Ammonia: ko = 1.8x10-5. Hydrofluoric acid: 7.2 x10 + Hydrogen sulfide: kai...

A: We are authorised to solve only one question at a time. Please post rest of the questions separately...

Q: 9. What volume of 6.00 MNAOH contains 2.50 mol NaOH? A. 2.50 L B. 6.00 L C. 2.40 L D. 0.417 L E. 15....

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Q: Consider the I-131 nucleus that is used to treat thyroid. Mass of I-131 is 130.78302 amu. 1) If the ...

A: We have to used equation of first order rate constant. As we know nuclear reaction follows first ord...

Q: What is the normality of a solution containing 50g HCl in 1.5 L of solution?

A: Given :- mass of HCl = 50 g               volume of solution = 1.5 L  To be calculated :- normality ...

Q: Which of the following is an aldol condensation product derived from the self-condensation of 2-buta...

A: The aldol condensation product derived from the self condensation of 2-butanone is:

Q: Name the chemical test(s) and state the expected result that could be used to distinguish the follow...

A:   Functional group identification test:  a. Ester and ketone can be distinguished by 2,4-DNP test   ...

Q: . Circle the conformation (as drawn) that will most rapidly undergo E2. A в H3C H Ph Ph Ph CH3 Ph Ph...

A: In E2 elimination reaction anti periplanar beta hydrogen is removed and form alkene   

Q: A pressure of 150 KPa is equivalent to how many meters of water? Of mercury (sHg = 13.6)?

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Q: Provide reagents/conditions to accomplish the following syntheses. More than one step is required in...

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Q: AGCI(s) Ag (aq) +72.68 C1 (aq) +56.4 +96.2 S° (JK-1 mol-1) AH f(kJ/mol) Use the data given to calcul...

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Q: In the following relationships, which quantities are variables and which are fixed: (a) Charles's la...

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Q: Which of the following diene(s) cannot undergo the Diels-Alder reaction? II IV

A: For a Diene to undergo Diels Alder rxn it should have cis double bond along single bond.

Q: Be sure to answer all parts. Consider the equilibrium between molecular oxygen and ozone 30,(3) = 20...

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Q: During the decomposition of CaO2(s) into Ca(s) and O2(g), 100.0 mL of gas is collected by the displa...

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Q: If a sample of nitrogen gas in a sealed container of fixed volume Is heated from 25°C to 150°C, the ...

A: The container is a sealed container, Volume remains constant.  Given that the temperature is increas...

Q: A 1.00 g piece of copper metal is initially at 100.0°C. It is dropped into a coffee cup calorimeter ...

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Q: Predict the Product. Provide the major organic product(s) for each of the following reactions shown ...

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Q: The following table shows data from the titration of four 10.0 mL samples of a solution containing h...

A: a.) First we would Calculate volume of NaO* added using formula :  Volume of NaOH added = Final bure...

Q: When a different isomer of the starting chloride is used, the exact same product is observed despite...

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Q: What is the percent composition of scopolamine, C17H21NO4? __C% __H% __N% __O%

A: Molar mass of C17H21NO4 = molar mass of (17C + 21H + 1N + 4O)  = [17(12)+21(1)+1(14)+4(16)] = [204 +...

Q: 7. Classify each process as exothermic or endothermic and indicate the sign of AH°rxn. a. ice meltin...

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Q: How many moles of NH3 must be dissolved in water to give 819.8 mL of solution with a pH of 10.97? K,...

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Q: 3) а. Draw the oxocarbenium ion that is formed as an intermediate in the following reaction: но OH O...

A: The oxygen of atom of ketal group gets protonated which is then follwed by ring opening to produce o...

Q: What is the effect of the following on the volume of 1 mol of an ideal gas? The pressure changes fro...

A: Data given: Number of moles of an ideal gas, n = 1 mol Initial pressure, P1 = 760 torr Final pressur...

Q: 4. Consider the reaction between sulfur trioxide and water: SO3 (g) + H2O (1) → H2SO4 (aq) A chemist...

A: 4) Given, SO3(g) + H2O(l) ➝ H2SO4(aq) mass of SO3 react = 61.5 g mass of H2O react = 11.2 Actual yie...

Q: A semiconductor has wide energy gap and requires less energy to move an electron from the valence ba...

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Q: The solubility product constant for cadmium fluoride (CdF2) is 6.4 x 10-3.  What is the molar solubi...

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Q: Fl2(g) + 2 NaOH(aq) → NaC1(aq) + NaCl

A: Answer: yes , the reaction is represented above, is a  redox reaction . Because chlorine is both oxi...

Q: H3C CH3 H3C CH3

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Q: The equilibrium constant for the reaction Br2(g) + Cl2(g) ↔ 2BrCl (g) is 86. If the initial concentr...

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Q: Which of the following molecules contains at least one atom that has less than a complete octet (exc...

A: Given,  Which of the following molecules contains at least one atom that has less than a complete oc...

Q: Calculate AS°rxn for the following reaction. The S°f for each is given in the table. 4 NH3 (g) + 5 O...

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Q: Differentiate sweet molecules in Column A using the criteria in column B. Acesulfame-K and Aspartame...

A: The above molecules are various artificial sugars that are used now a days.

Q: consider the following exothermic reaction at 0.00 °C and 1.00 atm Se04 (g) Se(g) + O2 (g) , Kc = 2....

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Q: In the following Lewis structure of [SiF6]²;, every atom, bond and lone pair is positioned. To compl...

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Q: the identity е

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Q: Colligative Properties and Kinetics 7. The packing efficiency of a unit cell is described by: Packin...

A: To calculate packing efficiency we need to calculate volume occupied by sphere , which we can calcul...

Q: When monitoring a reaction, the initial temperature of the reaction is 29 ºC, it rose to 57 ºC and t...

A: Given, Initial temperature of the reaction is 29°C Final temperature of the reaction is 39°C We have...

Q: 1. Consider the titration of 25.0 mL of a weak acid, 0.100 M HCOOH (Ka = 1.8 x 10- 4) with 0.100M NA...

A: we need to calculate pH after addition of given volume of NaOH for the titration

Q: 8. Circle the substrate that will result in an alkene that could be consider both the Hoffman and Sa...

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Q: The reaction AB(aq) »A(g) +B(g) is second order in AB and has a rate constant of 0.0168 L-mol .s rea...

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Q: OH 1) Н.О, КОН CI. OH он 2) H,O, HC1 pcresol chloroacetic acid H3C +HC1 pmethylphenoxyacetic acid

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Q: Ammonia reacts with oxygen as follows: 4NH3(g) + 702(g) → 4NO2(g) + 6H2O(g) AH° = -1132 kJ Calculate...

A: 4 moles of ammonia on reacting with oxygen produce 4 moles of nitrogen dioxide gas and 6 moles of wa...

Q: 1. Benzoic acid is a weak carboxylic acid that undergoes proton transfer with water. When a 0.125 M ...

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Q: 1. A solution was prepared by dissolving 1210 mg of K3Fe(CN)6 (MM=329.2 g/mol) in sufficient water t...

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Q: Which of these is not aromatic? (A) (B) (C) (D) CH CH

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Q: a. H,PO.(aq) + Fe(NO,)2(aq) → O H,PO,(aq) + Fe(NO,)2(aq) → HNO3(aq) + Fes (PO.)2() Rule 6: Most phos...

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