A chemist carefully measures the amount of heat needed to raise the temperature of a 576.0 mg sample of a pure substance from -4.3 °C to 20.3 °C. The experiment shows that 10.1 J of heat are needed. What can the chemist report for the specific heat capacity of the substance? Be sure your answer has the correct number of significant digits. -1 g K

Q: If the pKa of water is 15.7 and the pKa of HF is 3.2, which is the stronger base, OH or –F? -F -OH

A: Dissociation of a weak acid is given by: HA  ⇌  H+  +  A- The acid dissociation constant of this aci...

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Q: Select which of the following substances would require the least amount of energy to increase 20.0 g...

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Q: An analysis of acid mixture was conducted using reversed-phase liquid chromatography with 20 mL/min ...

A: Column length (L) = 10 cm Flow rate (r) = 20 mL/min Retention time of Y (tR,Y) = 4.4 min Width of Y ...

Q: N2(g) +O2(g) 2NÓ(g) The equilibrium constant K for this reaction is 0.857 at the temperature of the ...

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Q: Nickle has a face-centred cubic structure and has a density of 8.90 grams per cubic centimeter. What...

A: Given, Element - Nickel (Ni) Structure - FCC (face centred cubic lattice) Density (d) = 8.90 g/cm3 M...

Q: Which of the following approximate pKa ranges for the following acids is correct?  You don't need a ...

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Q: 5. Calculate both [H'] and [OH] for the following solutions at 25°C. Be sure to clearly identify all...

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Q: The graph below shows two titration curves: 40.0 ml of two different acids are titrated with 0.100 M...

A: The pH based acid-base titration curve is a curve plotted between volume of base and pH of solution ...

Q: Discuss and explain the one thing that enables a certain mass of air molecules to travel at a certai...

A: Generally there are three types of velocities for a gas and they are: Root mean square speed, Vrms =...

Q: For the following reaction, H2(g) + I2(g) ⇌ 2 HI(g), Kp = 44 at 25.0 o C. Calculate the value of Kc

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Q: In order to prepare a solution, we need to dissolve 205 mL of ethanol in sufficient water to give a ...

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Q: At a certain temperature the rate of this reaction is first order in HI with a rate constant of 7.09...

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Q: Calculate the concentrations of Na+ and CO32- after mixing 1.00 L of 0.200 M NazSO4 with 2.00 L of 0...

A: Given: Concentration of Na2SO4 = 0.200 M Concentration of K2CO3 = 0.100 M Volume of Na2SO4 added = 1...

Q: View Policies Current Attempt in Progress If a reaction requires 0.110 moles of NaNO3, how many mill...

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Q: How much energy is released when a 50g sample of gaseous ethanol is cooled from 78.4 degrees celsius...

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Q: 1. The temperature of a 15.0 g sample of a metal (specific heat 0.040 J/g.°C) is raised by 18.2°C. H...

A: Using relation:  Q = m×s×∆T     -----(1) where Q is amount of heat absorbed m is mass of substance s...

Q: What's the name of the following compound? Is it a strong base or a weak base? What happens when it...

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Q: Chlorodifluoromethane (CHF2Cl) was widely used in the compression/cooling circuits of refrigeration ...

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Q: 1 point Consider the following equation: S(s, rhombic ) + O2( g) → SO2( g) At 298 K, AH° for this re...

A: We know the thermodynamic equation., ∆G° = ∆H° - T∆S° where, ∆H° = -269.9 KJ/mol ∆S° = +11.6 J/mol.K...

Q: Consider the energy diagram for a three step mechanism. How many activation barriers does it have? (...

A: Given-> Steps in mechanism = 3  

Q: When 1.006 grams of sucrose (Molar mass 342.3 g/mol) is burned in a bomb calorimeter, the temperatur...

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Q: A. CH3COCH3 B. CH3CH20CH2CH3 C. 6-ethyl-3,7,7-trimethyldecane D. (CH3)3NO (show formal charges!) E. ...

A: Draw line angle structure: A) CH3COCH3  B) CH3CH2OCH2CH3  C) 6-ethyl-3,7,7-trimethyldecane D)(CH3)3N...

Q: 2) Ninety thousand grams of a gas (180 kg/mol) is stored in a tank at 120 kPa and 600 K. If the gas ...

A: Given that,  The mass of the gas is m = 90000 g = 90 kg. The molar mass of the gas is M = 180 kg/mol...

Q: Calculate the volume in liters of a 6.9 x 10 mol/L silver(II) oxide solution that contains 25.0 g of...

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Q: Which of the following compounds will be expected to be strong electrolytes in aqueous solution? Sel...

A: Strong electrolytes are those which dissociates completely when dissolved in water.

Q: Following AAS analysis, a graph of absorbance versus ppm nickel standard gave a best-fit line y = 0....

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Q: hat is the systematic name of the given structure?

A: Systematic name of given compound is:

Q: Sulfur dioxide and oxygen react to form sulfur trioxide, like this: 2 SO2(g)+O2(9) 2 SO3(g) The reac...

A: Exothermic reaction are those in which energy is released and endothermic reaction are those in whic...

Q: What is the freezing point depression of a 1.50 m solution of sucrose in water? No need to include t...

A: Given :- molality of sucrose solution = 1.50 m  To be calculated :- freezing point depression

Q: 100 g of a solution (specific heat of 0.32 J/g C) undergoes a reaction in which 74.84 J of heat is r...

A: Mass of solution = 100 g Specific heat = 0.32 J/g oC Heat released = 74.84 J

Q: Describe the process of catalytic cracking used in the petroleum refining industry

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Q: When an alcohol is oxidised what is the functional group of the product?

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Q: 5- In each part, choose the structure that best adapts to the infrared spectrum

A: g) In this case, the structure should be  Reason: simply base value for isolated aldehyde peaks in I...

Q: Glucose levels are routinely monitored in patients suffering from diabetes. The glucose concentratio...

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Q: Hydrogen iodide decomposes to form hydrogen and iodine, like this: 2 HI(g) - H2(g) + L(g) Also, a ch...

A: Kc is defined as the ratio of concentration of products and reactants raised by respective powers.

Q: es of 25 A diameter, find: a) number of surface atoms Ns. b) number of volume atoms Nv. (or bulk ato...

A: Given as, Diameter=2.5nm,Radius=1.25nm,volume=43 πr3 =43 ×3.14×1.253 =8.18nm3

Q: Glucose levels are routinely monitored in patients suffering from diabetes. The glucose concentratio...

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Q: (CH3)2-CH-CH(CH3)-CH2-CH(C6H5)-CH2-CH2-CH3 O 2,2-Dimethyl-octyl-benzene O 2,3-Dimethyl-5-phenyl-octa...

A: 1. Select the principle carbon chain 2. Numbering 3. Naming (prefix + word root + suffix)

Q: Consider the reaction H2(g) + Cl2(g)   ⇌ 2 HCl(g), which is exothermic as written. What would be the...

A: Given :-  H2(g) + Cl2(g)   ⇌ 2 HCl(g)  Reaction is exothermic  To determine :-  effect on the equili...

Q: A crystal was analyzed using X-ray diffraction with radiation Element 1 (pm) from a molybdenum sourc...

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Q: ercury and oxygen react to form mercury(II) oxide, like this: 2 Hg(1)+O2(g)→2 HgO(s) a certain tempe...

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Q: Type of Compound Formula Chemical Name Binary / Ternary Ionic / Acid/Base/ Molecular Salt/Hydrate

A: 7 Ammonium Hydroxide 8 Ternary 9 Ionic 10 O3PbS 11 Ternary 12 molecular

Q: Which of the following C5H8 compounds best fits the spectrum. The integration values are shown above...

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Q: Given the information about the following acids i) HW p Ka =2 ii) HX p Ka =6 iii) HY p Ka =17 iv) HZ...

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Q: C2H5OH combustion releases 1200 kJ/mol. How many giving off of C2H5OH is to be burned to generate 62...

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Q: What is the test to identify the haloalkane functional group?

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Q: Determine the multiplicity of each signal in the expected 'H NMR spectrum of the following compound....

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