Which of the following represents the correct use of an internal standard (IS) in a quantitative analysis method? a) IS added to all standards and samples b) IS is added to all samples and the highest concentration standard c) IS added to all standards d) IS added to all samples

Q: ) Given the absorbance spectrum shown below, what wavelength of light would you use for nickel(II)…

A: Absorbance is defined by the amount of light absorbed by the sample at a particular wavelength. In…

Q: d. Find AH for the dissolution of 1.00 g NaOH in water. e. Find AH for the dissolution of 1 mole…

A:

Q: Which of the following reactions result in a positive ∆ Ssys? A. Pb(NO3)2 (aq) +KCl (aq) ---> PbCl2…

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Q: A 15.0-mole sample of NH3 is added to the Ag compartment (assume 1.00 L of total solution after the…

A: Given: Galvanic Cell: Silver-Cadmium Moles of Ammonia = 15.0 mol Volume of Ag Compartment = 1.0 L…

Q: Three gases, A, B, and C, are mixed into one container with a total pressure of 702.1 mmHg.  The…

A: Total pressure of container = 702.1  partial pressure of gas A = 103.8 mmHg  partial pressure of gas…

Q: Dra Calculate the volume in milliliters of a 3.84M sodium nitrate solution that contains 50.0 g of…

A: Molarity of a solution can be defined as the number of moles of solute per litre of solution.…

Q: Which of the following compounds has the highest vapor pressure at 25°C? O acetic acid, boiling…

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Q: The pH of swimming pools is made slightly basic by spreading solid Na2CO3 across the surface.…

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Q: (4) Please write the equation for the measurement of glucose using 3,5-dinitrosalicylic acid (DNS)?…

A: We have to write the equation between the glucose and 3,5-Dinitrosalicylic acid (DNS) which resulted…

Q: Predict the electron-domain and molecular geometries for a. SeCl2, b. CO3-.

A: VSEPR theory: The structure of a molecule can be determined by using the VSEPR theory. According to…

Q: Lewis dot structures were invented by a guy named Lewis. Each dot in a Lewis Structure represents a…

A: given question is about lewis dot structure.

Q: This activity is structured as a game, wherein your challenge is to create correct ionic compound…

A: Ionic compounds:- Ionic compounds are those which are formed between a cation and an anion having…

Q: Draw the starting structure that would produce this product under these conditions. Br Select to…

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Q: What is Sº for A in the reaction 3 A → 2 Bif AS°(rxn) =-282.7 J/mol · K? [S° (B) = (240.0 J/mol ·K)]

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Q: A 25.0-mL 0.500-M KNO3 solution is mixed with a 30.0-mL 0.400-M Fe(NO3)3 solution. What is the molar…

A: The concentration of the solution formed by mixing two or more solutions containing the same solute…

Q: 4. The equation of state for a van der Waal's gas is: RT Vm-b p= a V² m 2 where Vm is the molar…

A: The expression for internal pressure can be derived from internal energy as shown below: dU = TdS…

Q: Which of the following is the strongest intermolecular force present in butane, C4H10? covalent…

A: Given -> C4H10 -> It is a alkane .

Q: 10. The following disaccharide is: CH₂OH MA OH CH₂OH A) an a anomer and a reducing sugar B) a B…

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Q: In general, what is the correct correlation between ligand type and its trans-directing ability in…

A: Trans direction ability is the ability to of the ligand to substitute the ligand which is trans to…

Q: Which of the following compounds does not follow the octet rule? N2 BeCl2 CH4 NH3

A: To obey octet rule,  each atom in the compound should have 8 valence electrons except for hydrogen…

Q: Which of the following processes will lead to an increase in the entropy of the system? (Circle all…

A: Entropy is a measurement of randomness or disorderedness in a system. Entropy of a state of a…

Q: N X H 1. LDA 2. Ph O H ? H3O+ (excess) HO Ph O H I `H

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Q: What is the mass of KHP would you need in order to use 35.00 mL of 0.400 M NaOH to titrate it?

A: Molarity of NaOH =0.400 M Volume of NaOH solution = 35.00 ml ( 1 L =1000 ml)  = 0.035 L

Q: The first step of the addition of a hydrogen halide to an alkene is the addition of H+ to an sp²…

A: In the first step of addition of hydrogen halide to alkene electrophilic attack of HBr to alkene…

Q: A piece of copper at 96.9 °C is placed in a calorimeter containing 38.5 grams of water at 21.5 °C.…

A: We will equate heat lost by copper and heat gained by water and then calculate mass of cu from it.

Q: Name the following molecule by its IUPAC name. CH₂ محمد Cl

A: Since,Rule of IUPAC-1) Longest chain as parent chain.2) Numbering start from those side where more…

Q: A 57.0 g piece of metal with specific heat 0.622- final temperature of the water? Use 4.184 Select…

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Q: What are the list of difference between SN1, SN2, E1, and E2? (such as the type of nucleophiles…

A: The above types of reactions are important for making alcohols and alkenes in a reaction mixture.…

Q: Draw the starting alkyne that would lead to this major product under these conditions.

A: Alkyne gives a hydration reaction in the presence of sulfuric acid and a mercuric acid catalyst to…

Q: A 25.0 mL aqueous solution of 1.32 M K₂SO4 is necessary for a particular reaction. How many grams of…

A: Molarity of substance is the number of moles present in one litre of solution.

Q: Predict the major product for this reaction. Ignore inorganic byproducts. H3O+

A: Given reaction is hydrolysis of terminal alkyne.  Water is added across carbon carbon triple bond.…

Q: 2. 20.0 g of white crystals, which might have been either NaCl (MW = 58.0 g/mol) or sucrose (MW =…

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Q: What is the expected product from the addition reaction of excess HBr to 2- butyne? A) 2-bromobutene…

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Q: A mixture of methane and nitrogen gases is maintained in a 5.15 L flask at a pressure of 2.66 atm…

A: Note : Since you have posted multiple questions, we are entitled to answer the first only. Please…

Q: A mixture of gas contain 4.00 g of element A and 4.00 g of element B.  Element A has a molar mass of…

A: To solve this problem we have to calculate the mole fraction of A and B .

Q: 6. What is the name of the following compound: A) Benzoic Acid B) Benzaldehyde C) Aniline D)…

A: Solving only first question in accordance with the guidelines. You can repost remaining questions.…

Q: The metabolic oxidation of glucose, C6H12O6, in our bodies produces CO2, which is expelled from our…

A: Gas equation, PV = nRT

Q: Advance Study Assignment: Heat Effects and Calorimetry 1. A metal sample weighing 147.90 g and at a…

A: As you have asked for question one we are providing you the solution for the same. “Since you have…

Q: Sodium hydroxide reacts with phosphoric acid to form sodium phosphate and water. if 35.60 grams of…

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Q: Explain why (in general) the first ionization energy increases across the period. (Don't worry about…

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Q: a (UM) 150 142.7 10 135.4 15 128.1 20 120.8 25 113.5 30 106.2 What is the rate constant, k? t (min)…

A: We will use integrated rate law for zero order reaction to calculate rate constant.

Q: Draw 3-(2-methylcyclopentyl)cyclooctyne

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Q: 9:16 Question 26 of 32 Draw the starting alkyne that would lead to this major product under these…

A: -> When alkyne  reacts with excess HBr it produce gem dihalide .Hence, substrate must be Alkyne .…

Q: Some soluble compounds are listed in the table below. Complete the table by filling in the name or…

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Q: Calculate the pH of a bicarbonate/carbonate buffer in which the concentration of sodium bicarbonate…

A: Given :  Concentration of NaHCO3 = 0.31 M  Concentration of Na2CO3 = 0.83 M  Ka of HCO3- = 5.6 x…

Q: For each of the following salts, determine the pH of a 2.50M solution of the salt.  You will need…

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Q: What is the correct expression for the equilibrium constant K? Select an answer and submit. For…

A: Equilibrium constant is defined as ratio of  products concentrations to the reactants concentrations…

Q: 21.293 mL of 0.214 M weak base B is titrated with 0.276 M HCI. Calculate the pH at the equivalence…

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Q: Draw the most reasonable Lewis structure of C₂H3CI. )

A: We will draw lewis structure , completing octet of all atoms.

Q: Caffeine is a bitter stimulant drug and is found in varying quantities in seeds, leaves, and so on.…

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Analytical Tools

Analytical tools or analysis tools help one to get into a conclusion or results from the data collected. Analytical tools can be applied for simple data sets and also in the case of big data analytics.