Is the change represented by the following illustration best categorized as a chemical change or a physical change? In the illustration, F is color-coded as green. 000

Q: Calculate the morality of the following solution: 4.2 g of LiBr in 52.6 of water

A: Note: It should be molality not morality Molality: It can be define as the number of moles of solute…

Q: 7. Which of the following acids is strongest, based on the values of their acid ionization…

A: We have been asked two questions. In one question, we have been asked to choose strongest acid on…

Q: The Ka of the conjugate acid of a painkiller is 1.2 x 10-8. What is the Kb of the painkiller 25°C?

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Q: How many different molecules are drawn below? Han ی

A: We have been given organic molecules.We have been asked how many different molecules are…

Q: Consider the mixing of 25.00 mL of 0.0500 M Pb(NO3)2 with 25.00 mL of 0.0500 M NaCl and the…

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Q: Two solutions are combined: 611 mL of 139 mM MgSO4 and 566 mL of 174.5 mM NH4OH. How many moles of…

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Q: CN OH HCI, H₂O A H₂ Raney Nickel HCI EtOH (excess)

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Q: Silicon tetrachloride can be prepared by heating silicon in chlorine gas. You react 12.30 g of…

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Q: At what temperatures is the following reaction, the reduction of magnetite by graphite to elemental…

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Q: One route of using natural gas to generate hydrogen is called "steam reforming": CH4 (g) + 2 H₂O(g)…

A: Here , CH4 will be completely used.

Q: Write a resonant structure for the molecule of dicyanamide. All atoms should satisfy their stability…

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Q: alculate the bond order of the dioxygen molecule and those of the molecular ions O2-, O22- and O2+?…

A: More is the bond order , shorter is the bond length or less is the Bond order , greater is the bond…

Q: Increasing the temperature of an exothermic reaction increases the Keq value. True False

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Q: . A 0.125-g sample of a monoprotic acid of unknown molar mass is dissolved in water and titrated…

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Q: as the temp of a reaction is increased the rate of the reaction increases why? (see image

A: Reaction rate is the rate at which the reaction takes place.  It depends on several factors like…

Q: At constant temperature, the pressure of gas is proportional to the concentration of gas particles…

A: Pressure of a gas is the force exerted by the gas molecules colliding with the walls of the…

Q: Which one of the following covalent compound structures is characterized by the SMALLEST bond angles…

A: Bond angle is defined as the angle between the two bonds that is angle between two orbitals…

Q: 83. Determine the pH of each solution and classify it as acidic, basic, or neutral. (a) pOH = 8.5 =…

A: We know that PH = 14 - POH

Q: 2. Based on Appendix 1, identify any two (2) significant bonds and the approximate wavenumbers…

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Q: A chemist prepares a solution of magnesium bromide (MgBr.) by measuring out 87. mg of MgBr, into a…

A: Molarity is defined as number of mole of solute divide by volume of solution in liter

Q: Problems 17.23 Calculate Kp for the following reaction at 25°C: mai aranetseit #ropoutsdi H₂(g) +…

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Q: which is the rate constant of a first order process that has a half life of 225

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Q: Determine E, AG, and K for the overall reaction from the balanced half-reactions and their standard…

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Q: Each of the following syntheses will not produce the desired product. In each case, identify the…

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Q: 4. Suggest an efficient synthesis for each of the following transformations: OH OH

A: The given reaction involves conversion of one primary alcohol to secondary and vise versa by using…

Q: Consider the reaction below:                                     AB(g) ⇄ A(g) + B(g) If there is…

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Q: The rate constants for the bromination of several disubstituted stilbenes are given in the table…

A: Nucleophiles are that substance which is rich in electrons and attacks an electron-deficient…

Q: You have prepared a solution using 2.08 g of NaOH (M.W.=40.00 g/mole) and 2.54 moles H2O(MW 1…

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Q: Consider the equilibrium reaction, M3X(s) ⇌ 3M+(aq) + X3-(aq) What is the molar solubility (s) of…

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Q: Which of the alcohols is 3°? CB 5-од. OH 111 0 A) ОН O B) 0 c) 1 || X. 4 CH, IV -CH₂

A: Since, If carbon containing -OH is surrounded by three carbon then alcohol is known as 3° alcohol.…

Q: 1 1 1 1 1 A Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 B C Total Pressure (kPa) Air Pressure (kPa)…

A: The Clausius-Clapeyron equation is used to find out the enthalpy of vaporization from the graph…

Q: Fe³+ (aq) | Fe(s) || Cl(aq) | Cl₂(g) | Pt 3+ Cl₂(g) | Cl(aq) | Pt || Fe(s)| Fe³+ (aq) 3+ Fe(s) |…

A: Lose of electrons is called Oxidation Gain of electrons is called Reduction

Q: In the following reaction, identify which is the Lewis acid and which the Lewis base. Give your…

A: We have been given a reaction and we have been asked to identify Lewis acid and lewis base. We have…

Q: CI NaOMe M₂OH

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Q: 1. Acetic acid is a classic example of a Enter the correct word or phrase: 2. If the concentration…

A: Arrhenius acid is a substance which dissociates in water and produces H+ ions is called Arrhenius…

Q: A student monitors a reaction using TLC. The starting material has a spot with an Rf of 0.25. After…

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Q: What volume of a 0.600 M HCl solution is required to react completely with 2.50 g of sodium hydrogen…

A: Given :  Mass of sodium hydrogen carbonate = 2.50 g  Concentration of HCl = 0.600 M  Mass of CO2…

Q: The Ka of the conjugate acid of a pesticide is 6.7 x 10-6. What is the Kb of the pesticide at 25°C?…

A: The product of the acid dissociation constant of an acid and the base dissociation constant of a…

Q: A pharmacist adds 5 mL of 404 M KBr to 219 mL of 375 M KCI, what is the total Eq of the mixture?…

A: Since you have posted multiple questions, we will provide the solution only to the first question as…

Q: Which of the following is the conjugate base of the substance, HCr2O7-? Cr2O72- H2Cr2O7 Cr2O7

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Q: Determine values of ΔG° and equilibrium constant K at 25°C for the following reaction catalyzed by…

A: This is a simple calculation of net change in enthalpy and entropy of the whole reaction followed by…

Q: 5. Synthesis of aspirin a. Write the sequence of reactions to produce aspirin using salicylic acid,…

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Q: H₂O₂(aq) + Br¯(aq) → H₂O(aq) + OBr¯(aq) (slow) H₂O₂(aq) + OBr¯(aq) → H₂O(aq) +Br¯(aq) + O₂(g) (fast)

A: Reaction intermediates: These are the species which are produced during the reaction. These are not…

Q: Arrange the following alkyl halides based on their reactivity (from fastest to slowest) towards…

A: According to the question, The compound I → 1-bromobutane The compound II→ 2-bromobutane Compound…

Q: For many purposes we can treat ammonia (NH3) as an ideal gas at temperatures above its boiling point…

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Q: What volume of a 1.5 M KOH solution is needed to provide 6.75 moles of KOH?     0.50 L     4.5 L…

A: Molarity (M) is a concentration term for a solution. The molarity of a solution is defined as the…

Q: Draw the major organic product formed in the reaction.

A: In the given reaction hydrogen bromide reacts with 1-phenyl-1,3-butadiene to give an addition…

Q: The Lewis structure of urea is shown below. a. Apply the VSEPR model to find the basic geometry and…

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Q: For a particular reaction at 225.9 °C, Δ?=−1076.67 kJ/mol , and Δ?=785.08 J/(mol⋅K) . Calculate ΔG…

A: T = 225.9 °C = 498.9 K ΔG = -1076.67 kJ/mol ΔS = 785.08 J/(mol⋅K) = 0.78508 kJ/(mol⋅K) ΔG at -22.8…

Q: 3. (a) Fill in the missing reagent and the product? CH3CH₂-CC-CH3 A ? CH3CH₂ (b) Provide the IUPAC…

A: Given that, (a) We have to give the missing reagents and products. (b) We also have to give the…

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.