Before proceeding to the analysis, the ____________ of the sample must be considered. a. size b. content c. dryness d. homogeneity

Q: Boron and sulfur form two binary compounds. The first contains 0.2247 g B/1.000 g S, and the second ...

A: Atomic Mass of B - 10.811 u Atomic Mass of S - 32.065 u Given, For the second compound 0.1348 g B/1....

Q: 2. How many grams of oxygen gas must be reacted with excess sulfur dioxide to produce 87.1 g of SO;?...

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Q: 5. Sucrose is about 42.12% Carbon, 6.48%Hydrogen and 51.4% Oxygen. Determine the mole fraction of ea...

A: To solve this problem we have to calculate the mole fraction of each elements present in sucrose . 

Q: Volumetric glassware must be dry prior to usage. It can be placed in laboratory oven to be dried qui...

A: It is important that the volumetric glassware be completely clean before you use it For perfect read...

Q: Predict the products of the reaction below. That is, complete the right-hand side of the chemical eq...

A: Given-  Reactants= HI ,H2O  Products=?  

Q: 11. Compare the bond energies of C-C, C=C, and C= C_Which one takes more energy to break the bonds a...

A: Bond energy is directly proportional to bond strength. 

Q: 1. Provide a correct name for the following compounds: HO ОН CH3 H3C° ÓH CH3 а) NO 2 b)

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Q: Consider the reaction below. 2.7 mol of A and 5.9 mol of B are added to a 7 L container. At equilibr...

A: Chemical equilibrium is defined as the stage at which both reactant and product are in equilibrium.

Q: Which of the following statements about the n-electron system of a linear conjugated organic molecul...

A: According to the molecular orbital theory the atomic orbitals combine to form molecular orbital. The...

Q: Question 1 1. The concentration of a 3500ml aqueous HCl solution was increased from 0.15M to 0.25M b...

A: Given - - > Initial Volume, V1 = 3500 ml Initial Molarity, M1 = 0.15 M After evaporation the aque...

Q: Ascorbic acid (H,C,H,0,) is a diprotic acid. The acid dissocation constants for H,C, H,0, are K- K00...

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Q: Calculate the volume in milliliters of a 0.76 mol/L aluminum chloride solution that contains 300. mm...

A: Given :-  concentration of AlCl3 solution = 0.76 mol/L  no.of moles of AlCl3 = 300.mmol  To calculat...

Q: At a height of 15 kilometers, the temperature is 217K and the pressure is 12.1 kPa. What is the mean...

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Q: ow as it ripens D. A&B C. Throwing 50 coins results in all tails 8. According to the third law of th...

A: Third law of thermodynamics states that  Entropy of a pure substance at perfectly crystalline state...

Q: Write the Hamiltonian operator for the LiH molecule. Which of the terms in the Hamiltonian operator ...

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Q: ) What is the name of the compound below? a) 3-oxopentanoic acid b) 1-acetopentanone c) acetopentano...

A: Here we have to write the IUPAC name of the following componund whose structure is given.

Q: What are covalent compounds (molecules)? Give two examples of covalent compounds and their formula.

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Q: Consider the following reaction at 117O K. Hy(0) + co,te) H,0g) + coG) af the reaction is started in...

A: Hydrogen reacts with carbon dioxide to form water and carbon monoxide. The equation for the balanced...

Q: What is  the pH of an (aq) solution, [OH-] = 4.6 × 10-10 M.

A: pH is equal to negative logarithm of hydrogen ions

Q: OH CrO H,SO, ОН CH3 f) H3C- Br2 -OCH3- FeBr, g) CH, NBS Na*O-t-Bu A h)

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Q: The following reaction is carried out with [PCl5]i = 0.400 M at 25 °C. PCl5(g) ⇌ PCl3(g) + Cl2(g)  ...

A: Answer: Equilibrium constant expression for a reaction is equal to the ratio of molar concentrations...

Q: After 20 min, a reactant has decomposed to 85% of its original concentration. Which order would the...

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Q: Calculate the   pH   and  percent ionization of 0.05 M acetic acid Ka = 1.8 x 10 -5.

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Q: A hydrogen electrode is immersed in a 2.2 M solution of acetic acid at 25 °C. This electrode is conn...

A: The half cell reactions are, Anode: H2→2H++2e-Cathode: 2Fe3++2e-→2Fe2+Overall cell reaction: H2+ 2Fe...

Q: What is the pH of a solution that has [OH"] = 8.31 x 10I M? Enter your answer with the correct numbe...

A: Given that : [OH-] = 8.31 × 10-11 M    

Q: Calculate the pH of a buffer prepared by mixing 400. mL each of 0.20M oxalic acid and 0.35 M sodium ...

A: Given- Volume=400mL Concentration of oxalic acid =0.20 M  Concentration of sodium oxalate =0.35M pH ...

Q: Determine the pH of an aqueous solution where [OH] = 6.0 x 10 10 M.

A: Given data : [OH-] = 6.0 × 10-10 M.  To find : pH 

Q: 1. PPH3 2. NaNH2

A: We have to predict the Missing reagents.  

Q: A chemist prepares a solution of calcium bromide (CaBr,) by measuring out 84.7 g of calcium bromide ...

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Q: One or more of the monomers below are needed to make the polymer to (CH) -(CH) Choose which one(s). ...

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Q: Déčidé whéther each molecule or polyatomic IC éách móléčulé or polyatómic io is polar or nonpolar. I...

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Q: Calculate the volume, in L, of water that must be added to dilute 24.6 mL of 10.6 M HCI to 0.105 M H...

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Q: These are practice questions. Please help! Thanks.

A: Volume of container = 8 Litre Moles of A = 2 mole Concentration of Compound = Moles of Compound/Tota...

Q: 5) Construct the orbital correlation diagram for hexatriene-cyclohexadiene interconversion, to what ...

A: Since you have posted multiple questions, we will answer the first one for you. To get the remaining...

Q: Nitric oxide, NO, is formed in automobile exhaust by the reaction of N2 with O2 (from air) N2(g) + ...

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Q: On the basis of Kc for the following reaction, would you expect the reaction to go almost completely...

A: Equilibrium constant Kc = [P]÷[R] [P] = concentration of product  [R] = concentration of Reactant 

Q: Draw all the structural isomers for the molecular formula C,H¸O. Be careful not to draw any structur...

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Q: Which of the following substituents is the strongest activating group in electrophilic aromatic subs...

A: It is electrophilic substitution reaction on benzene. More electron donating group will increase ele...

Q: 1. 25.00 mL of 0.2M acetic acid and 3.81 mL of 0.20 M NaOH were mixed together. The resulting soluti...

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Q: 2. Write balanced net ionic equations describing each of the following reactions: Precipitation of t...

A: 1. Precipitation of tin(IV) sulfide with H2S Sn4+ (aq) + 2 H2S  (aq) → SnS2 (s) +  2H+ (aq) Here SnS...

Q: A mixture of ascorbic acid (CH706H, K2 = 6.8 X 105) and sodium ascorbate is prepared such that [CH,0...

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Q: Calculate the standard potential for the half-reaction below if the solubility product constant for ...

A: As per the guideline, since you have posted a question with multiple sub-parts, we have solved the f...

Q: An aqueous solution is made by mixing 4.3 mL of 0.40 M Co(NO3)2 and 8.7 mL of 12.0 M HCI, and the fo...

A: Answer: This question is based on Le-Chatalier's principle, according to which, on changing any para...

Q: PRINCIPAL OUANTUM NUMBER (n) OUANTUM NUMBER PRINCIPAL ELECTR ON Angular momentum (1) ELECTRON SPIN (...

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Q: Reagent Concentration (Molecular weight) Amount Needed Bicine 5.00 mM (163.17) NaCI 500.0 mM (58.44)...

A: Amount needed calculated by the concentration

Q: Calculate the concentrations of all species in a 0.770 M NaCH3COO (sodium acetate) solution. The ion...

A: NaCH3COO = 0.770 M Ka = 1.8 × 10−5  

Q: determine the mass percent hydroxide, oh^-, in cu(h2o)4(oh)2

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Q: 2-Methylpropane have more than one kind of hydrogen and will generate 2 different products with brom...

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Q: (i) What is the difference among 1, 2, and 3?

A: The main difference is the substitution at the rightmost 5 membered ring. In compound 1 there is no ...

Q: Does a reaction occur when aqueous solutions ofsodium acetate and potassium hydroxide are combined? ...

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