What volumes of 0.50 M HNO2 and 0.50 M NaNO2 must be mixed to prepare 1.00 L of a solution buffered at pH = 3.50? Ka =4.0x10-4 Volume of HNO2 = Volume of NaNO2 %3D

Q: Give the group number where the cation belongs 1. Mercurous(Hg2-) ion gives a white precipitate with...

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Q: change of the entropy for a process of dissolving the polymer in certain solvent is = -0.07- mol-K' ...

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Q: 2. Write the auto-protolysis reactions of the following substances а. Н2О. b. CH3COOH. С. CH3CH2NH2 ...

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Q: Atom A has 4 valence electrons. Atom Z has 6 valence electrons.  For the AZ3-2 ion How many valenc...

A: Identification of element:   As per our guideline we have to answer first three questions only.

Q: a. Pb2* ion Probable Observation Treatment After heating After adding K2CrO4 b. Ag* ion Treatment Af...

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Q: The CH3COOH could have greater vapor pressure lowering than NaOH., true or false?

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Q: What is the formula for phosphorus pentachloride? Hint: for CO2, write CO_2

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Q: a) Write the definition of reduction and oxidation.

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Q: The following IR spectrum corresponds to which compound? Explain. Wavenumber, cm'

A: Given IR data : A broad peak from 3300 cm-1 to 2500 cm-1 belongs to O-H Stretch of carboxylic acid....

Q: Calculate the energy for each level of the H and He". HYDROGEN Orbit Energy N= 1 n=2 n =3 n = 4 N =5...

A: We have to calculate the energy for each level of the H and He+ in this question:

Q: Test for SO,* ion Take for instance you have a test solution and you will add 6 M HNO, drop by drop ...

A: To the 5-10 drops of the obscure, add some HNO3 + AgNO3.Arrangement of the encourage demonstrates th...

Q: What is the pH of a 0.0013 M solution of niacin? Ka = 1.5x10^-5

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Q: there are 275g of rubbing alcohol in 500.0g of solution. answer questions 2a and 2b using this info....

A: 2) Given, Mass of rubbing alcohol = 275 g Mass of the solution = 500.0 g a)  % (m/m) of rubbing alco...

Q: The following IR spectrum corresponds to which compound? Explain. Tranamittance, %

A: Given IR data : 2969 cm-1 belongs to sp3 C-H Stretch of alkane 1715 cm-1 belongs to C=O stretch of ...

Q: 2) Provide plausible stepwise mechanisms using curved arrow notation to explain the elementary steps...

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Q: Which one of the compounds shown below is an aldehyde? Он H-C-H CH3CCH;CH3 CH3-0-CH3 CH3CHCH,CH3 CH;...

A: In this question we have to just detect a functional Groups of given organic compounds .  

Q: Zinc reacts with copper sulfate in a single replacement reaction as follows             Zn (s)  +  C...

A: Given:-  Zn (s) +CuSO4 (aq)→ZnSO4 (aq)  + Cu(s)  mass of Zn = 50 g  Actual yield of Cu = 42.50 %  To...

Q: In each of the examples below select 1the choices wnich are correct sets of values for a, and m tor ...

A: We know that,  n = Principal quantum number  l = 0 for s    = 1 for p    = 2 for d    = 3 for f 

Q: Provide the IUPAC name for the condensed structural formula shown here. CH2 CH2 CH3 CH2 H3C CH CH2 H...

A: 1. Select the principle carbon chain 2. Numbering 3. Naming (prefix + word root + suffix)

Q: Q3 a) Without any calculation state if then poly(methylacrylate) is soluble in methylacrylate. Why? ...

A: GIVEN:- a) Without any calculation state if then poly(methylacrylate) is soluble in methylacrylate. ...

Q: Calculate the concentration of Sr^ 2+ when SrCr * O_{4} starts to precipitate from a solution that i...

A: Given: Concentration of CrO42- = 0.0025 M  

Q: In a cationic exchange reaction, how many grams of K+ will replace 1 gram of Са?

A: In cationic exchange reaction, 2 moles of k+ will replace Ca2+ (because k has 1 positive charge and ...

Q: Melting Boiling Point Point Molar Density (g/mL) Chemical Notes Mass (g/mol) (°C) (°C) Acetone CAS: ...

A: Answer:- Rest of this chart is filling -   

Q: H)3 + H(NO3)

A: There is not proper information for the above ques.

Q: A system does 551 kJ of work and loses 216 kJ of heat to the surroundings. What is the change in in...

A: Given Data : 1. Work done (W) = -551KJ 2. Heat to the surroundings (Q) = -216 KJ Work done by the sy...

Q: 1)What is the specific heat if 24.8 g of a metal absorbs 275 J of energy and the temperature rises f...

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Q: What is wrong with the Lewis structure depicted below? [Image description: A Lewis structure with a ...

A: The Lewis structure given is,  

Q: For H3PO4, Ka1 = 6.9 x 10-3, Ka2 = 6.2 x 10-8, K,3 = 4.8 x 10-13 What is the pH of a 0.13 M solution...

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Q: A student carres out the equilibrium constant experiment for the formation of FeSCN" (ag) using iron...

A: The slope of the beer's plot is greater than it should been, resulting in smaller Kc values calculat...

Q: Identify why a weak base-strong acid titration has an equivalence point pH below 7. O The strong aci...

A: At  equivalence point the pH of weak base and strong acid is below 7.  

Q: A 1.00 L buffer solution is 0.200 mol L-1 in C6H5COOH and 0.250 mol L-1 in C6H5COOLI. The Ka for C6H...

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Q: Question 6 A mercury "button" battery is used when we need electrical energy in small spaces. Zinc m...

A: Correct option is D  

Q: A good rule-of-thumb for a weak acid-strong base titration is to choose an indicator whose transitio...

A: In a corrosive base titration, the titration bend mirrors the qualities of the comparing corrosive a...

Q: The formula for ammonium sulfate is (NH4),SO4. Enter it as: (NH_4)_2SO_4 2

A: Given that, Formula of ammonium sulfate = (NH4)2SO4

Q: Bromocresol Green is an indicator with a pka of 4.9. Its protonated form is yellow and its ionized f...

A: Given, the pKa of bromocresol green = 4.9 The color of its protonated form is yellow and the ionized...

Q: Balance the Redox Reaction. Always include the state of each species: (s), (l), (g), or (aq). O2(g)...

A: Given reaction : O2(g) + Sb(s) → H2O2(l) + SbO2(aq)

Q: Supply missing reagents and prodacts in the following reaction schene. Ne mechani ple and disregond ...

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Q: Metal complexes are metal atoms or ions that is surrounded by several ligands. These metal complexes...

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Q: can be m metnyi as snov the reaction below. CH3CI (g) + 3 Cl2 (g) -> CCI4 (g) +3 HCI (g) In the firs...

A: Given-> CH3Cl(g) +3Cl2 (g) -->CCl4(g) + 3HCl Initial concentration of Cl2 =0.303 M Final conce...

Q: . Calculate the wavelength (in nm) of the red light emitted by a barcode scanner that has a frequenc...

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Q: a) Write all the reactions and equations for an open carbonate system. (b) Derive the equations for...

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Q: 3.25 mL of Biomarker A (4.21 x 10-7 mol L-) was brought up to volume with deionized water in a 50 mL...

A: Given data : Initial volume(V1) = 3.25 mL Initial concentration(M1) = 4.21 × 10-7 mol L-1 Final volu...

Q: A solution contains 1.33x102 M silver nitrate and 1.18x10 M lead acetate. Solid sodium chloride is a...

A: Given data : Concentration of silver nitrate = 1.33 × 10-2 M Concentration of lead acetate = 1.18 × ...

Q: What is the predicted major product for the reaction shown? Fuming H,SO, ÓCH3 SO;H SO3H SO3H осн ÓCH...

A: ->OCH3 is electron donating group due to +R effect it is ortho ,para directing. ->CH3 is elect...

Q: 3-9. A 40-cu ft tank is filled with air at 14.7 psia and 80°F. The tank also contains a 15-lb block ...

A: The pressure will be 58.14 psi

Q: A strong base, such as sodium hydroxide (NAOH), is added in a solution of 0.1 mol/L acetic acid (CH3...

A: Given:     Here we have to use the concept of buffer solution and apply the Handersons equation for...

Q: A student determined that the mass of four pennies was 8.7 grams. Use this information to calculate ...

A: Given :-  No. of pennies in 8.7 g = 4  To calculate :-  No.of pennies in 2.5 pounds   

Q: How many grams of lead sulfide are used to produce 126 grams of lead oxide

A: Given, mass of lead oxide = 126 grams Molar mass of lead oxide = 223.2 g/mol  

Q: Write a balanced chemical equation for the following reactions and classify reactions. i. Liquid oct...

A: Here, we have to write the balanced chemical equations and have to classify the reactions: i. when l...

Q: How much heat energy does 50.0 grams of water absorb if it’s temperature goes from 22.0 Celsius to 2...

A: Answer: Given data Mass of water m=50.0g Rise in temperature of water ∆T=(25.3-22)°C∆T=3.3°C