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Q: body-centered unit cell and has an atomic radius of 0.143 nm and atomic weight of 92.91 g/mol.

A: Niobium  is also called as  Columbium   symbol of Niobium is Nb. Niobium atomic number is 41. Niobiu...

Q: Solve for solution 4, pH= 4.15

A: In the given question we have to calculate the final pH of the solution after dilution. 

Q: Which alkene gives a meso compound upon reaction with bromine (Br2)? a. b. Oc. O d.

A: The addition of bromine to an alkene in a nonpolar solvent produces vicinal dibromo alkane. The addi...

Q: Q3. Consider a hypothetical element M, which is capable of forming stable simple cations that have c...

A: Ionic compound is a compound which is held together by electrostatic forces that is ionic bonding. I...

Q: %234 %23 十 十 23 %23 %23 a) How many sigma antibonding molecular orbitals are shown? b) How many elec...

A: Given Molecular orbital diagram

Q: 8)A 0.155mol sample of oxygengas has a volume of 834milliliters at a pressure of 4.93atm. Calculate ...

A:

Q: A penny has a mass of 2.50 g and the Moon has a mass of 7.35 ×10 kg. Use this information to answer ...

A: From given Mass of one penny= 2.50g Mass of moon = 7.35×1022 kg Now we want to calculate mass of one...

Q: 2.) Five standardized dilutions of aqueous lead(II) chromate solution were prepared by adding a volu...

A: For the given question, we have to determine the amount of moles of PbCrO4 present by using the form...

Q: Radioactive isotopes used in cancer therapy have a “shelf-life,” like pharmaceuticals used in chemot...

A: Given data, Initial activity of 60Co = 5000 Ci Manufacturing date = October 6, 2011 Final date = Apr...

Q: What is band broadening? Explain the phenomenon of eddy diffusion.

A: These are terms with reference to chromatography:

Q: All of the folowing are derivatives of carboxylic acid EXCEPT

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Q: Copper (II) Phosphate is extremely insoluble, but forms a complex ion with CN- that can drive the Co...

A: This question is related to chemical thermodynamics.

Q: 2.) Five standardized dilutions of aqueous lead(II) chromate solution were prepared by adding a volu...

A: The concentration of the [CrO42-] in 100 mL deionised water can be detrmined by using the formula. M...

Q: give the electron pair geometry in the molecular geometry of  and Show the position of the lone pair...

A: The ion given is I3-.  

Q: With complete solutions

A: Note - Since you asked a question with multiple sub-parts, we are bound to do only the first three s...

Q: Draw all four products that are expected when 2-ethyl-3-methyl-1,3-cyclohexadiene is treated with on...

A: The mechanism of the above reaction is given below

Q: give the electron pair geometry in the molecular geometry of  and Show the position of the lone pair...

A: Information: We have to determine the electron pair geometry of NO3-.

Q: A chemistry graduate student is studying the rate of this reaction: 280, (g) → 2S0, (g) + O, (g) 2SO...

A: The given reaction : 2 SO3(g) → 2 SO2(g) + O2(g)

Q: What is the molar solubility (in mol/L) of AgCl (Ksp = 3.89⋅10^−16) in a 0.13 M AgNO3 solution.

A: From given  Ksp given is 3.89 ×10-16  So with this molar solubility in 0.13M AgNO3 is calculated as ...

Q: Predict the product for the following reactions:

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Q: Which is the correct assignment of chirality at C2 and C4 of the following molecule? OH 4 Но Н a. 2R...

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Q: The electron configurations for four main-group elements are given. Match the electron configuration...

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Q: major produc+ ? ph NaoH

A: Aldol condensations between different carbonyl reactants (benzaldehyde and acetaldehyde) are called ...

Q: Which of the following is a secondary alcohol Select the correct response: O- OH OH OH

A: We have five types of alcohol , we have to see which one is our secondary alcohols.  

Q: Consider the molecule KrF2. What is the: a) VSEPR notation b) molecular geometry c) bond angle d) pr...

A: VSEPR - This theory is used to predict the arrangement of electron pairs around the central atoms in...

Q: Reaction of H, in Na and NH3 with 2-butyne yields Select the correct response: none of the above co,...

A: The given problem comes under Birch reduction. The birch reduction of alkyne gives trans product. Th...

Q: Add or subtract the following measurements. Be sure each answer you enter contains the correct numbe...

A: The operations given are,  

Q: What does XRD and XRF methods are used for?

A: XRD stands for X-ray diffraction and XRF stands for X-ray fluorescence.  

Q: What is the solubility of La(IO₃)₃ in a solution that contains 0.350 M IO₃⁻ ions? (Ksp of La(IO₃)₃ i...

A: Common ion effect:-  The common ion effect refers to the decrease in the ionization of an ionic comp...

Q: Ksp= 3.25x10^-13

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Q: What is the solubility (in mol/L) of Cu3PO4 given that the Ksp is 1.21⋅10^−20.

A: A question based on solubility product, which is to be accomplished.

Q: Predict the product for the following synthetic sequence. 1) H30* 2) Na2Cr,O7 , H2S04 , H2O ? 3) PhM...

A: The reaction taking place is given as,

Q: Just need help on part B please   10) Iron nail rusts when exposed to oxygen.4Fe(s) + 3 O2(g)2 Fe2O3...

A: We have reaction of iron with oxygen gas to form rust. b). We  have to calculate the amount of iron ...

Q: please help

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Q: The following Lewis diagram represents the valence electron configuration of a main-group element. T...

A: We have element having Lewis diagram, we have to predict the element in period 3 that has this Valen...

Q: 1. At constant temperature, a sample of helium at 760. torr in a closed container was compressed fro...

A: Given: The initial pressure of the helium gas (P1) = 760  The initial volume of the helium gas (V1) ...

Q: Identify the reagents that to perform the following reaction

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Q: In the titration of 170.0 mL of 0.4000 M HONH₂ with 0.2000 M HBr, how many mL of HBr are required to...

A: HONH2  +  HBr ..................>  NH2Br   +  H2O   This is the reaction that is going to happen ...

Q: KMno. H2O CH,OH ? H но PC. HO oxidation COOH So, conc H2SO.

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Q: Predict the product for the reaction shown.

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Q: Name (please print): Heat Capacity of an Unknown Metal Post Lab Questions 1.) When determining the h...

A: Note:-  Since you have asked multiple question, we will solve the second question for you. If you wa...

Q: How would you carry out the following reaction? Please show the synthesis. Would like to confirm m...

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Q: Answer all and detail as possible

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Q: please help

A: For nomenclature,  one has first numbering the molecule.  Numbering should do in such a way that lon...

Q: To answer the questions, interpret the following Lewis diagram for IF5. 1. For the central iodine at...

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Q: Let a solution of equal molarity be formed from substances C and D. If the pure vapor pressures of t...

A: From given  Total pressure is calculated for ideal mixture and we are assuming mole fraction of C an...

Q: ) You are doing an experiment to measure the solubility product constant of lead(II) chromate (PbCrO...

A: We have to write the balance solubility reaction for lead chromate  .  

Q: Pertinent General Reactions.  Bayer’s oxidation:             Chomic acid oxidation: Lucas test: Ferr...

A: The table given is,

Q: For sulfur hexabromide, state a) electronic geometry b)molecular geometry c) hybridization (superscr...

A: Since you have posted multiple subparts, we can do only three as per guidelines.  Kindly post remain...

Q: What atomic or hybrid orbitals make up the sigma bond between N and H in ammonia, NH3 ? orbital on N...

A: In order to determine atomic or hybrid orbital we have to see hybridization

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.