ow many calories of heat (energy) would it take to heat 13.0 g of water from 31.0 °C to 59.0 °C? = How many kilocalories of heat (energy) would it take to heat 193.0 g of water from 23.0 °C to 87.0 °C? q= cal kcal

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A: Mass of brick = 39.2 g Mass of ethanol = 39.2 g  Mass of wool = 39.2g Change in Temperature = 50.7°C…

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A: Here we are required to find the concentration of hydronium ion.

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A:

Q: Which of the following are TRUE about using a buret? Choose all that apply. Group of answer choices…

A: A burette is a graduated cylinder with a stopcock at one of the ends used to deliver accurate volume…

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A: STP stands for Standard Temperature and Pressure. It is defined to be 273 K (0 degrees Celsius) and…

Q: A student heats 84.17 mL of water to 95.27°C using a hot plate. The heated water is added to a…

A: Heat loss by hot water = heat gain by cold water + heat gain by calorimeter density = massvolume

Q: For the following molecule: H₂C H₂C CI How many peaks will be observed in the proton (¹H) NMR of…

A:

Q: Determine whether the molecules below are (R)- or (S)- isomers. C(CH3)3 H3COC Н НО. CH₂Br 0 Н""" H3C…

A: We have to first do the numbering according to the priority order.  If it is clockwise and hydrogen…

Q: Question 4 Consider the following reaction and answer the questions that follow: MeO OMe…

A: Given that, an intramolecular claisen reaction scheme. We have to give the answers of the following…

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Q: go Consider the orbital shown. Indicate the number of radial and angular nodes in this orbital.…

A: The number of radial nodes can be calculated using the formula n–l–1.  The number of angular nodes…

Q: Question 20 of 23 > Balance the chemical equation for the reaction of BaCl, and Na₂SO4. chemical…

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Q: VIII. Please plan the following synthesis. Any reagents/solvents can be used CH3 CH3 -H CH₂CH3…

A:

Q: H2SO4 and H2O aren't part of the equation that delta H is being determined for, so wouldn't they…

A: This can be explained as:  Left side H20 (l) and H2SO4 cancel out the right side of H2O and H2SO4…

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A: Answer: Different concentration units are mentioned in the problem statement and we have to find out…

Q: For the diprotic weak acid H2A, ?a1=2.9×10−6 and ?a2=8.2×10−9. What is the pH of a 0.0650 M solution…

A: Diprotic acid is dibasic acid which has two acidic H+. This will dissociate two times.

Q: 1. Calculate the pH of the following solutions: (Ka HCO2H is 1.8 x 10-4 and Kb NH3 is 1.8 x 10-5) a.…

A: Given Data :

Q: Determine the volume (in mL) of a 3.07 M solution of ZnBr2 that contains 0.734 moles of ZnBr2.

A: The molarity of ZnBr2 solution is = 3.07 M  Molarity means ;  Number of moles of solute present per…

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A: In the first question we have to calculate the molar concentration of [OH]- of 0.0849 g of RbOH.

Q: Ionic bonding is expected in which of these compounds? E.N Values: H = 2.1; O= 3.5; K = 0.8; F = 4.0…

A: Given EN values- H=2.1 O=3.5 K=0.8 F=4.0

Q: Emmett, a sophomore chemistry major, was trying to separate an unknown mixture.  His instructor told…

A: Here we need to identify the functional group present in fraction 1, fraction 2, and fractions 3…

Q: The pOH of an aqueous solution at 25°C was found to be 14.00. The pH of this solution is The…

A: pOH of solution = 14.00  Using formulae :  pH   + pOH = 14  pOH = -log [OH-] Or   [OH-] = 10-pOH  pH…

Q: (6) Draw the structure for each solvent and explain why it is polar protic or aprotic. a. DMSO b.…

A: The solvent which can act as proton donor is called as polar protic solvent.  The solvent which…

Q: CH3COOH + NaCH3COO 35mL total solution 0.86M concentration of acetic acid 0.14M Concetration of…

A: Given: Total volume of the solution = 35 mL Concentration of acetic acid = 0.86 M Concentration of…

Q: (4) Which of the following is a stronger base? Explain. a. Cl or OH b. CN or F

A: 1. Base is  a substance which have tendency to accept a proton .

Q: A 28.5 g piece of gold is heated and then allowed to cool. What is the change in temperature (°C) if…

A:

Q: A sample of solid silicon is heated with an electrical coil. If 133 Joules of energy are added to a…

A: We have to solve the given problems. Formula: q = mC(Tf-Ti) Where, q is the thermal energy, m is the…

Q: When 4 moles of aluminum are allowed to react with an excess of chlorine gas, Cl₂, how many moles of…

A: We have the reaction  2Al + 3Cl2  →  2AlCl3 4 moles of aluminium are reated with excess Cl2, we need…

Q: For the following insoluble salt, write a dissociation equation showing the products and balancing…

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Q: For the symbolic (skeletal) equation below, write a word equation with the appropriate state…

A: A process in which reactants are converted into products is known as a chemical reaction.

Q: (J). H H H ZHNGTD + ४

A: This is reaction of ketone with amine.

Q: Complete the equation for the ionization of water by drawing the conjugate acid and conjugate base.…

A: This can be explained as:

Q: CH3Br or CH₂I (CH3)3CCI or CH3C1

A: Rate of Sn2 reaction increases if the alkyl halide is less bulky it means rate of reaction will be…

Q: Macmillan Learning Draw the major organic product for each of the hydroboration-oxidation reactions.…

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Q: 1. Calculate the equilibrium constant for the following reaction at 25°C: Fe2+ (aq) + 2Ag(s) Fe(s) +…

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Q: Which of the following reactions will lead to the smallest temperature change in the calorimeter? A…

A: When acid reacts with a base, salt and water and heat energy. The smaller the amount of water formed…

Q: Consider the titration of 300.0 mL of 0.556 M NH3 (Kb = 1.8 ×10–5) with 0.500 M HNO3. After 150.0 mL…

A: Answer: In this question we have to find out the pH of a buffer solution made of weak base NH3 and…

Q: An ethyl group (CH3CH2-) that is attached to a quaternary carbon has what splitting pattern in a NMR…

A: As we know that : In general an NMR  resonance will be split into N+1 peaks where N is the number of…

Q: How much energy does an electron need to absorb in order to go from n=1 to  n=5?  (k=2.179*10-18J)

A: When an electronic transition takes place from a lower energy level to a higher energy level energy…

Q: The Haber-Bosch process is a very important industrial process. In the Haber-Bosch process, hydrogen…

A: Please note- As per our company guidelines we are supposed to answer only one question. Kindly…

Q: Which reaction coordinate corresponds to the following reaction? HBr E Rxn Progress a ·M..M E d E…

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Q: Which of the following atom has a subshell which is half filled? O Ba O Fe O Au O Ar O Zn

A: The electron configuration of an element describes how electrons are distributed in its atomic…

Q: [References] Use the References to access important values if needed for this question. What is the…

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Q: Consider 0.100 M aqueous solutions of the following chemicals. Rank them in increasing order of pH…

A: Acids and acidic substances have pH less than 7. Bases and basic substances have pH more than 7.…

Q: 4. Why is it important that this complexing agent used for the Ca electrode has long hydrocarbon…

A: di(-n-decyl) phosphate acts as cation exchanger in liquid-based ion-selective Ca2+ electrode, which…

Q: 3. When 1.010 g sucrose (C12H22011) undergoes combustion in a bomb calorimeter, the temperature…

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Q: 1. What would be the best base for performing the elimination reaction shown? 2. What major…

A: Given : structure of reactants  Tip : strong base prefer E2 reaction.

Q: M Try Again Your answer is incorrect. • Row 2: Your answer is incorrect. • Row 3: Your answer is…

A: In Double replacement reactions exchange of ions between two ionic compounds takes place.If one of…

Q: Select all of the correct statements about reaction quotients and equilibrium constants from the…

A: Reaction quotient and equilibrium constant have the same mathematical expression, but they differ in…

Q: (NH4)2S is a soluble compound True False

A: Yes , the (NH4)2S is a soluble compund. Hence the statement is True.