What is the melting point of the substance modeled by this heating curve? F. 150 D E 135 120 105 90 75 60 45 30 A 15 Heat (kJ) Created by E. Lee for Virtual Virginia (2021) Temp. (°C) B C

Q: At the equivalence point, you had equal number of moles of acid and base, and the acid was…

A: In part b, volume of NaOH added is not given. So, we are solving just the first part. Please post…

Q: .Given the reaction at equilibrium: 2 A(g) + 3 B(g) A2B3(g) + heat Which change will not affect the…

A: A question based on equilibrium concept that is to be accomplished.

Q: 3. Name the unknown drug: On addition of hydrochloric acid (diluted 8.3%), gas is released, when…

A: On addition of hydrochloric acid (diluted 8.3%), gas is released as follows: MCO3+2HCl →…

Q: Calculate the amount of heat required to heat 25.0 g of water at 80.0°C to obtain steam at 100 °C.…

A: There are two processes involved here: 1. Heating water from 80°C to 100°C 2. Phase transition of…

Q: Tungsten-180 decays into hafnium-176 and an unknown particle. What is the unknown particle

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Q: O ADVANCED MATERIAL Designing a galvanic cell from two half-reactions A chemist designs a galvanic…

A: Here we are required to find the cell potential of the given electrochemical reaction.

Q: The pH of a solution is 5.64. What is its hydrogen ion concentration ([H+]) in mol/L

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Q: Given the reaction at equilibrium: N2(g) + O2(g) 2 NO(g) If the temperature remains constant and…

A: Given-> N2(g) + O2(g) <-----> 2NO(g)

Q: 7. Which of the following statements is true for a reaction with the equilibrium constant K,= 7.6 x…

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Q: 1.1 A 50.0 g aluminium disk at 300 °C is placed in 200 cm' of ethyl alcohol at 10 °C, then removed…

A: A 50.0 g aluminium disk at 300 °C is placed in 200 cm³ of ethyl alcohol at 10 °C, then removed after…

Q: Draw the products of the complete oxidation of the following fatty acid: i. OH

A: Draw the products of the complete oxidation of the following fatty acid:

Q: What element has 3 neutron 4 electrons and 4 protons

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Q: Determine work (AG) that the non-standard voltaic cell below can produced. Pt| Cl2 (s) | Cl- (1.00…

A: In the given question we have to calculate the Free energy of the given cell reaction.

Q: a. b. P CH3 CH3CHCH₂CH₂CO₂CH3 CO₂H Br OH 1. DIBAH 2. H₂O+ SOCI₂ CH₂CO₂COCH₂ Pyridine

A: We can expect aldehyde, acid chloride and ester as major products for the given reactions…

Q: A gas has a volume of 42.3 mL at 24.0 °C. What is its volume at 102 °C? 33.5 mL 9.95 mL 180. mL 53.4…

A: The volume can be calculated using charle's law

Q: Which of the following statements is CORRECT? Standard Reduction Potential (in volts) Mg2*/Mg -2.37…

A: Reducing agent is that which reduces the other and oxidise itself.

Q: . How many liters are required to obtain 0.182 moles of NaNO3 from a 0.824 M NaNO3 solution?

A: Given that:  Moles of NaNO3 = 0.182 moles Concentration of NaNO3 solution = 0.824M

Q: B. At 40 °C, water has a vapor pressure of 55.3 torr. What is the vapor pressure of the solution…

A: Molality of solution = 2.319 molal Mole fraction of EZ = 0.04011

Q: A student synthesized 3.214g of Ni(NH3),Cl2 from 4.023g of NiCl2•6H2O. He dissolved 0.81g of…

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Q: Na2CO3 (aq) + CaCl2 (aq) → complete ionic equation: net ionic equation:

A:

Q: 6. Using curved arrows draw at least one resonance structure for each of the following species. Note…

A: Detail resonating structures are given below

Q: 29. An integrative rate law experiment shows that the plot of In [NO2] vs. time is a straight line…

A:

Q: ai Which of the following is an electrolyte? B. CH. C Co, D. P,O, A KO

A: The substances which dissociate into ions (cations and anions) when they dissolve in polar solvent…

Q: Q2 How many grams of Ca(OH); are required to neutralize 1.000 L of 0 ED0 MH,PO, solution?

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Q: cell phone emits a radio signal with a frequency of 1.910 x 10^9 Hz. Determine the wavelength

A: Frequency is inversely proportional to wavelength

Q: 3. An experiment was made of the effect of temperature on the volume of 1.00 g of Hydrogen (H2) gas,…

A: For a definite amount of gas, at constant pressure, the volume of the gas increases with an increase…

Q: A galvanic cell is powered by the following redox reaction: 3 Br,(1) + 2 Cr(OH),(s) + 10 OH¯(aq) + 6…

A: Here we are required to find the cell potential of the given electrochemical reaction.

Q: Why are stronger acids and bases more dangerous to handle than weaker ones?

A: The species which has pH lower than 7 is acidic.  The species which has pH higher than 7 is basic.

Q: 2.4. Consider a buffer solution that is 0.24 M NH3 and 0.20 M NH CI If 0.005 mol of NaOH is added to…

A: We would first Calculate initial pH of buffer solution. Then we need to calculate oH after adding…

Q: B. Using two acids, HF and CH;CO,H, and their conjugate bases, write a Bronsted-Lowry acid-base…

A: Bronsted-Lowry acid-base theory: The Bronsted-Lowry acid-base theory states that the acid is a…

Q: Chiorine exists in natute aga mixture ot stable isotopes ,cl-35 and ct-37:74 the atomic magg of…

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Q: Draw the order of reaction graphs (reaction rate vs the concentration) for [NO] and [H2]. Explain…

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Q: 2. Which of the following is polyprotic acid? following statement is/are corc a. Benzoic acid…

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Q: 2) Would there be a change in the value of the enthalpy of combustion if the water is heated until a…

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Q: A 0.8250 g of soda ash sample was dissolved in distilled H O and diluted to 250-mL using a…

A: Please find the below attachment.

Q: Where can you find the acyl group in the structure? A. At the 1-amino position of the sugar B. At…

A: Let us first talk about an acyl group very briefly. The general formula of an acyl group is R-C=O…

Q: 5.Given the reaction at STP and at equilibrium: H2(g) + Cl2(g) 2HCl(g) Which change will result in…

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Q: Q16. Which one of the following is an incorrect orbital notation? B. 2d C. 3s D. 2p A 4f

A: 2d orbital can’t exist in an atom. We can provide an explanation for it from its subsidiary quantum…

Q: Calculate the pH and ionization percentage of a solution of 4.7 = PKa 0.2 molarity of ammonium…

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Q: Calculate the concentration of OH- and the pH of a solution that is 0.20 M in aqueous NH3 and 0.10 M…

A: Solutions                              Given that Calculate the concentration of OH- and the pH of…

Q: An environmental chemist working for the Environmental Protection Agency (EPA) was directed to…

A: Varying amounts of 85.0 ppb (μg/L) Cd2+ standard solution were added to the unknown sample solution.…

Q: What is the pH of a solution prepared by combining 0.696 mol of a weak acid (Ka = 5.5 x 10-5) with…

A: we need to calculate pH of the solution

Q: 1.00 L of hydrochloric acid is prepared and has a final pH of 1.045. What mass of HCl) is dissolved?…

A:

Q: 3. Name the unknown drug: On addition of hydrochloric acid (diluted 8.3%), gas is released, when…

A: On addition of hydrochloric acid (diluted 8.3%), gas is released as follows: MCO3+2HCl →…

Q: Given that standard reduction potentials at 298.15 K are E° Ag+ /Ag = +0.800 V and E° Cu?"/Cu =…

A: When Ag foil is soaked into Cu(NO3)2 solution, for Ag to dissolve the reaction involved would be:…

Q: CHEMISTRY Using stoichiometry, calculate the mass of pure phthalic acid that reacted with the 0.10…

A: Phthalic acid is an aromatic dicarboxylic acid having the formula, C6H4COOH2.

Q: The Ksp of MgF2 at a certain temperature is given to be 2.6 × 10-7.  What is the molar solubility of…

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Q: Why is it difficult to know whether you have added phenolphthalein to the flask solution before…

A: Phenolphthalein is an indicator use in acid-base titration. It is colorless in acid solution and…

Q: Draw and name compounds that meet the following descriptions: a. Four esters having the formula…

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Q: Identify the equation that represents the hydrolysis that occurs in an aqueous solution of KNO2.

A: The acid-base nature of the salt solution depends on the nature of the acid and base from which the…