in analysis of copper, the cathode of hollow cathode lamp is a? -Zinc -Tungsten -Lead -Copper

Q: Draw the structures of 5 structural and geometric isomers of dienes with formula C5H8.

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Q: - Draw the structures of 5 structural and geometric isomers of dienes with formula C5H8.

A: We have to draw the structural & geometrical isomer  of a diene having Molecular formula C5H8

Q: Normality of H2$O4 was determined by titrating 150.00 mL of the solution against a known NaOH soluti...

A:

Q: (a) Balance the following half-reactions by the ion-electron half-reaction method:                 ...

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Q: Decide whether the following molecules are mesocompounds. Draw the plane of symmetry

A: Where plane of symmetry or center of symmetry present that is meso compound.

Q: Staring with your pH for the 0.010M NaC2H302 solution, show your calculations for the concentration ...

A:

Q: For the mechanism provided below: a. Write the balanced equation for the overall reaction. b. Use th...

A: We will write overall equation and then predict rate law.

Q: Calculate the value of the equilibrium constant Kat a temperature of 298 K for each value of AG. AG ...

A: The complete solution is given below.

Q: 14-29. Calculate E^o, Delta G^o, and K for the following reactions.(a) 4Co^3+2H2O-->4Co^2+O2(g)+4H+

A:

Q: Question 16 of 20 How long will it take for the concentration of A to decrease from 1.400 M to 0.729...

A: For zero order reaction,   [A] (final)= - Kt + [A] (initial) [A](initial) = initial concentration of...

Q: how nmr work?

A: Nuclear Magnetic Resonance (NMR) spectroscopy is an analytical chemistry technique used in quality c...

Q: Monochromatic light is light of one color, one frequency. If a monochromatic light beam is increased...

A: Answer: This question is based on the basic understanding of wave nature of matter where we have to ...

Q: Predict the the regiochemical outcome (major product) for each of the following reaction, and explai...

A: It is diels alder reaction which takes place between diene and dienophile.  

Q: The luminescent first-order decay of a certain organic molecule yields the following data t/s 1 2 3 ...

A: Mean life time of a reaction is defined by average life time of all species in a 1st order reaction.

Q: 0.0471 kg of biphenyl (C12H10) is dissolve in benzene (C&H6) to create a solution with a total volum...

A: Given structures are :  Options are :

Q: Question 6 of 20 What is the molality of ions in a 0.323 m solution of Na2SO4 assuming the compound ...

A: Molality of Na2SO4 solution = 0.323 m  * Assume complete dissociation of compound take place. Molali...

Q: lon exchange is used to remove water hardness of a well water, which has a total hardness of 450 mg/...

A: The last option will be correct here  150 mg/L as CaCO3

Q: ) The percentual weight (w/w) of Carbon in Ca(HCO3)2. ) The amount of substance of 120g of Calcium C...

A: a) The percentual weight (w/w) of Carbon in Ca(HCO3)2. b) The amount of substance of 120g of Calcium...

Q: Substance Specific Heat Brick 0.20 Ethanol 0.58 Wood 0.10 culate the amount of heat, in calories, th...

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Q: Determine the rate law for the reaction A + B → C + D given the following experiment data. Initial T...

A: To find the rate law, first find order of reaction with respect to each reactant.

Q: 14. Given the 2 reactions below: 2NOE I. 2NO + 0z8) II. 2Li,Og + 1192 KJ → 4Lig Which statement is c...

A: The energy difference of the products and reactants is known as the energy change of a reaction.

Q: ST5B.2 - The reaction A2(g) + B2(g) --> 2AB(g) has an equilibrium constant Kc = 1.22. What is the eq...

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Q: Explain the effect of molecular weight concentration on the refractive indexs e 9:50

A: The refractive index depends on the molecular weight of the polymer at its small values. See the lin...

Q: A buffer solution is 0.438 M in HNO2 and 0.236 M in KNO2. If Ka for HNO2 is 4.5x10-4, what is the pH...

A: Given: concentration of HNO2 = 0.438 M  concentration of KNO2 = 0.236 M  Ka for HNO2 = 4.5 × 10-4  T...

Q: For an aqueous solution formed by mixing 4.50mL of 0.15M LİOH with 25.0mL of 0.100M C2H5CO2H (propan...

A:

Q: Consider a sample of gas that contains 625 moles of smokestack gas. How many molecules of SO, are co...

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Q: Explain why the [Fe(CN)6]3- ion has one unpaired electron, while the [Fe(NCS)6]3- ion has five unpai...

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Q: Another mixture of PClB(g), Clafg), and PCIS(g) is at equilibrium at a different temperature in a di...

A: Given: Mixture of PCI3 (g), Cl2 (g), and PCI5 (g) is at equilibrium at a different temperature in a ...

Q: Calculate the pH of the solution after the addition of 7.897.89 mL of 0.2790.279 M HClHCl. pH=pH=  ...

A:                                             [NaOCl] = 0.123 M                                    Vol...

Q: Ка(НС-Нз О2) %3D 1.8 х 10 5 1. 0.10 M acetic acid/0.30 M sodium acetate pH : 2. 0.30 M acetic acid/0...

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Q: How much heat is evolved when 27.0 g of glucose is burned according to this equation? C6H1206 + 602→...

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Q: A hetero Diels-Alder reaction is a variation of the Diels-Alder reaction in which one or more carbon...

A: We have find out reaction mechanism.

Q: Give the empirical formula of each of the following compounds if a sample contains the following qua...

A: The emperical formula can be calculated as follows

Q: Select the three methods typically used to determine an experimental rate law: | Reversible Reaction...

A: Here we have to determine the methods that are typically used to determine the experimental rate law...

Q: 4. Citric acid has three Ka values, Kal = 7.4 x 10-4, Ka2 = 1.7 x 10-5, and Ka3 = 4.0 x 10-7. Write ...

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Q: Determine the molar solubility of PbSO4 in pure water. Ksp (PbSO4) = 1.82 × 108. a. 1.82 x 10-8 M b....

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Q: The redox equation below is balanced. Mg + Fe3+ → Mg2+ + Fe  True or False?

A: No, this is not balance. So, the given statement is False.   

Q: If calcium carbonate were slightly soluble in water, would your percent yield be higher, lower, or u...

A: What is the effect of solubility of calcium carbonate in water on percent yield. 

Q: How to identify base and adjacent base and acid and adjacent acide in chemical reaction and other si...

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Q: What would happen to the cells if a hypertonic solution was injected directly to the bloodstream? ex...

A: Solution is of three types:-  Hypertonic  Hypotonic  Isotonic

Q: Write the charge of each ion using the format +1 or -1. You must put a positive or negative sign Wha...

A: Write charge of each ion of the following---  

Q: Give the number of protons, neutrons, and electrons for 5°C0 protons neutrons electrons

A: Given, Element : Cobalt (59Co) Mass number of Co = 59 Atomic number of Co = 27 Number of protons = ?...

Q: Synthetize 3-phenyl-2-propenoic acid from benzaldehyde using whateve organic/inorganic reagents are ...

A: The required compound can be prepared by using Perkin's reaction.

Q: Find the Correlation Chart for Functional Group Assignments in Infrared Spectra Compound: diphenylm...

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Q: 2. How much heat is lost when a 640 g piece of copper cools from 375 °C, to 26

A: When a solid substance is cooling then heat is lost . It can be determined by the following formula-...

Q: How much energy, in units of J, is required to heat 67.5 g of solid acetone from -145.3°C to -101.0°...

A: Heat is required when a substance is heating. It can be determined by following formula-  q = mc∆T  ...

Q: 1. Differentiate hydrolysable from non hydrolysable tannins.    Hydrolysable         Non Hydrolysa...

A: Tannins are complex organic compounds which are found in many species of plants. They are secondary ...

Q: For an aqueous solution formed by mixing 2.50mL of concentrated HNO3 (15.6M) with 305mL of 0.500M NH...

A:

Q: 8. Write the product of the reaction in three dimensions and indicate if the methyl groups in the pr...

A: As per guidelines we have to solve only the First question. We have to determine the stereochemistry...

Q: 2) 150.0 mL of a nitric acid (HNO3) solution is titrated to its bromothymol blue endpoint with 48.33...

A: We have to predict the concentration of nitric acid solution.      

Thermochemistry

Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.    

Exergonic Reaction

The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.