A 53.2 g sample of quartz, which has a specific heat capacity of 0.730 J-g¹C¹, is put into a calorimeter (see sketch at right) that contains 250.0 g of water. The temperature of the water starts off at 22.0 °C. When the temperature of the water stops changing it's 24.3 °C. The pressure remains constant at 1 atm. Calculate the initial temperature of the quartz sample. Be sure your answer is rounded to the correct number of significant digits. insulated container water sample-

Q: Convert 23.4 kJ to calories

A:

Q: Melissa was trying to synthesize a homopolymer of poly(8-decalactone), however she didn't have any…

A: To answer whether Melissa will be able to synthesise poly (δ-decalactone) if she uses 'benzyl…

Q: The D-Glucose‘s muta rotation example is given，now need help to draw D-Frutcose’s mutarotation （need…

A:

Q: Calculate the solubility of MgF2 in water if the Ksp for the compound is 6.4 x 10-9.

A: Given data Solubility product for MgF2 = 6.4x10-9  We know that MgF2 is dissociated as following…

Q: Calculate the absolute and relative uncertainties for the total delivered volume. Trial Volume…

A: Given:  The total volume delivered = the sum of volume delivered in all seven trails Hence, Vtotal =…

Q: What is the classification of the following reaction:   MgO + CO2 --> MgCO3   Combination…

A: In a Rxn , When two or more substances combine to form a new substance then this type of reaction is…

Q: The dissolution of ammonium nitrate occurs spontaneously in water at 25 °C. As NH4NO3 dissolves, the…

A:

Q: d. ... x Br KOt-Bu 50°C CH3NH₂ undergoing E2 undergoing SN2

A: Note: It is specifically mentioned to solve c and d only. Tertiary alkyl halides undergo SN1 and E1…

Q: Which ß-hydroxy carbonyl compound is not expected to undergo an E1cB elimination reaction? A) A) 6…

A: Compound which does not undergo E1cb Compound which is not a product of aldol reaction.

Q: A chemist titrates 120.0 mL of a 0.8655M ammonia (NH,) solution with 0.7463 M HBr solution at 25 °C.…

A: At equivalence point a salt of weak base, ammonia and strong acid, HBr will form.

Q: If the AH = 179 kJ/mol and AS = 104 J/K mol, at what temperature does this reaction become…

A:

Q: For the reaction: H₂(g) + CO₂(g) == H₂O(g) + CO(g) at 700°C, Kc = 0.534. Calculate the number of…

A:

Q: lewis dot structure to show the ionic or covalent bonding following compounds., and can you also use…

A: Here we have to write the  formula of compounds,  Lewis structure and types of compounds  I.e…

Q: Write the balanced nuclear equations for the following reactions and identify X

A: The general representation of an element is -                                           XZAWhere,…

Q: QUESTION 2 Which is an appropriate pair of two starting materials for the acetoacetic ester…

A: Here we to synthesize hepatane-2- one from acetoacetic ester.

Q: Using data found in Appendix E of your textbook calculate the nonstandard emf for each of the…

A: Dear student since you have posted multiple questions we will solve the first question for you if…

Q: What is the solubility of Cr(OH)₃ at a pH of 11.30? (Ksp Cr(OH)₃ is 6.70 × 10⁻³¹)

A: Given that: Ksp of Cr(OH)3 = 6.70×10-31 pH = 11.30

Q: According to the phase diagram shown below, If 6 moles of Methylethyl ether (A) is mixed with 4…

A: Given: Moles of Diborane = 4 mol Moles of methyl ethyl ether = 6 mol Temperature = 116oC To…

Q: Calculate the quantity of O₂ would be required to generate 13.0 mol of NO₂ in the reaction below…

A:

Q: What is the classification of the following reaction:   HgO2 --> Hg + O2   Decompostion Single…

A: Since, Decomposition reaction- In this reaction, one compound decompose into two or more than two…

Q: 450.0 g of octane (C₈H₁₈) burned during combustion produces 1.25 x 10³ g of carbon dioxide. [2C₈H₁₈…

A:

Q: At what tempature will a given process become spontaneous if  ΔH= -126 kj/mol and ∆S = 84 J/molK?

A: Given that:  dH = -126KJ/mol  dS = 84J/molK = (84J×1KJ/1000J)/molK = 0.084KJ/molK

Q: Suppose that you add 23.4 g of an unknown molecular compound to 0.250 kg of benzene, which has a K₁…

A:

Q: в Всион 5,2 KOH Е2

A: SN2 and E2 reactions proceeds through concerted single step mechanisms. There is no rearrangement…

Q: A chemist is studying the following equilibirum, which has the given equilibrium constant at a…

A:

Q: Calculate the pH of a sulfuric acid (H2SO4, Ka HSO4- = 1.2 x 10-2) solution that has a concentration…

A:

Q: Consider the conversion of C to D via a one-step reaction. The activation energy of this reaction is…

A: Enthalpy of reaction using Activation Energy curve.

Q: When 1.476 grams of sucrose (Molar mass 342.3 g/mol) is burned in a bomb calorimeter, the…

A:

Q: A chemistry graduate student is given 125, mL of a 0.50M benzoic acid (HC,H,CO,) solution. Benzoic…

A:

Q: onsider a reaction that has a negative H and a positive S. Which of the following atements is TRUE?…

A: For spontaneous reaction change in Gibbs free energy is negative

Q: What is the actual concentration of molecular NH3 in a 0.200 M solution of ammonia? The Kb value for…

A:

Q: Give the complete structure for the product(s) of this reaction. Some blanks m H H C A = C Marvin 15…

A: Organic reaction of alkene with H+ /H2O

Q: carbon monoxide(g) + oxygen(g) → carbon dioxide (g) at is the maximum mass of carbon dioxide that…

A:

Q: lly 애 I I D

A: Primary bromide first form a 1o carbocation in presence of silver which precipitate as AgBr. Then a…

Q: are the breakdown fragmentation pathways of 4-methoxyphenyl acetate

A: The mass spectrum of 4-methoxyphenyl acetate can be illustrated by the following: Initially, there…

Q: Which of the following BEST describes the titration of 20.0 mL 0.010M bromide ions with 0.0125 M…

A: The volume of solution at half of bromide ions reacted can be calculated using law of chemical…

Q: Consider the following data on some weak acids and weak bases: acid name formula hypochlorous acid…

A:

Q: The value of the entropy change for the process CaBr₂ (s) --> Ca²⁺ (aq) + 2Br ⁻ (aq) is __________.…

A: Entropy - It is the measure of randomness or disorder of a system, more randomness more entropy of…

Q: Does the Molarity change if some solution is removed?  Explain. Will adding solute to the saturated…

A: 1. Concentration is an intensive property. Therefore removing some solution will not affect the…

Q: Br KOC(CH3)3

A: E2-elimination reaction: The elimination reaction in which the attack of base and loss of leaving…

Q: For the following reaction, 10.7 grams of phosphorus (P4) are allowed to react with 39.6 grams of…

A: Given, The mass of P4 = 10.7 g. The mass of Cl2 = 39.6 g. The molecular mass of P4 = 123.8 g/mol.…

Q: A sample of polystyrene, which has a specific heat capacity of 1.880J·g−1·°C−1 , is put into a…

A:

Q: Write the nuclear equations for the following radioactive processes: When plutonium-246 is…

A: We have to write the nuclear reaction when plutonium-246 is bombarded with a specific isotope, which…

Q: Choose the compound that should have the lowest melting point according to the ionic bonding model.…

A: We need to find the compound have the lowest melting point according to the ionic bonding model. The…

Q: Consider the reaction: Ag⁺(aq) + Cl⁻(aq) → AgCl(s) How many grams of NaCl would be needed to…

A:

Q: why is the formation of an amide from an acid chloride proceeds easily when appropriate amount of…

A: Nucleophilic Substitution reaction - When a nucleophile attacks to electrophile centre and…

Q: A solution has an [H*+] on 1.56x10-6 a. What is the pH of this solution? b. What is the pOH of this…

A:

Q: Which of the sets of reagents below could make the alcohol shown below? ? Partial credit is…

A:

Q: Glucose (C6H12O6) can be converted by an anaerobic bacteria to acetic acid, carbon dioxide, and…

A: To solve this problem we have to know about the heat of reaction .

Q: Consider the oxymercuration of methylcyclopentene, Hg(OAc)2, H₂O as shown below.

A: First mercury group will add on double bond then H2O will react to give mercurated product having OH…