80g of water was heated from 26.0 to 48.0°C. The specific heat of water is 4.184 J/g°C. Is the reaction endothermic or exothermic and how much heat was absorbed/released?

Q: How many gallons of octane, C3H18, having a density of 0.703 g/cm3, would have to be burned to…

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Q: The structural formula shows isomers of hydrocarbons.

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Q: Identify reagents that can be used to achieve each of the following transformations (you might need…

A: We have to carry out the given transformation.

Q: 1- Calculate the rate law equation. Report the rate constant with its unit. What is the overall…

A: The rate can be calculated as follows

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Q: Consider the following reaction: Solid zinc metal reacts with hydrochloric acid to produce hydrogen…

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Q: 2. Find the wavelength of the light emitted when a 1.560 × 10-27 g particle in a 3.600 Å one…

A: We would use formula to calculate energy of one dimensional box. Form this we calculate energy of…

Q: 2On heating N,O, the following data obtained Pressure(mm) 360290 278 139 114 52 t, (Sec) 212255 300…

A: 2) To calculate order of the reaction and half life period for heating of N2O5.   Please post other…

Q: Calculate the bond order of iodine monofluoride.

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Q: Technetium-99m (gamma emitter, t1/2 = 6.02 hr) is widely used for diagnosis in medicine. A sample…

A: [Ao] = 4.52 × 10-6  t1/2 = 6.02 hr

Q: A sample of gas is heated from 25∘ C to 50∘ C. If the original volume is 500 mL, what is the final…

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Q: Quéstion 27 Which of the following compounds are saturated hydrocarbons (CnH2n+2). More than one…

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Q: 4. 3Li + iH → 2He+. 3 On 2 1H 4 2He

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Q: 5. A solution of nitrous acid has a pH of 2.45. The [H'] in mol/L and pOH must be respectively a.…

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Q: The balanced equation for the synthesis of ammonia is 3 H2 ( g )+ N 2( g)→2 N H3 (g)

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Q: Estimate the charge of each oxygen and nitrogen atom respectively for the organic molecule shown…

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Q: Calculate the standard enthalpy for the following reaction at 25°C: C(graphite) + H2O(g) → CO(g) +…

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Q: A Moving to another question will save this response. Question 1 Which of the following compounds…

A: Optically active compounds have chiral centre.If a compound has two chiral centre and their is plane…

Q: Cd2* forms a stable complex with EDTA. Consider the titration of 30.00 mL of 0.0525 M Cd" with 0.125…

A: The reaction between Cd2+ and EDTA takes place in the following way :Cd2+  +  EDTA  →…

Q: 4. a) Draw and label the E and Z isomers of 3-methyl-2-pentene: o end CH,CH=C-CH,CH, ČH, b) Draw the…

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Q: CHgONa 12 PHCH,-C-oC,H, HO (A) Ph-CH,-Č-CH-C-OC,H, Ph (B) PhCH,-C-CH-C-OH Ph

A: Organic chemistry is branch of chemistry in which we deal with organic reactant react to form…

Q: 13. According to Brönsted and Lowrry an acid and a base are species that behave respectively: A) as…

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Q: For a sand filtration device, the flow rate of the influent is 30 m3/day with the sand filter area…

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Q: Consider the following balanced chemical equation: 2 H20(g) + 2 SO2(g) → 2 H2S(g) +3 O2(g) A…

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Q: Q) When 2mol CO2 is heated at a constant pressure of 1.25 atm, its Temperature increases from 250 K…

A: Number of moles of CO2 = 2 Constant pressure = 1.25 atm  T1 = 250K  T2 = 277 K  Cp = 37.11Jk-1mol-1…

Q: Lec7 heat capacities H.W) When 178 J of energy is supplied as heat to 1.9 mol of gas molecules at…

A: Given that -  Energy or heat supplied = 178 J  Number of moles of gas Molecules = 1.9  Change in…

Q: The graph represents the energy change of a chemical reaction. Which must be true about the entropy…

A: Given, the energy profile diagram: We have to find the correct statement about the entropy of the…

Q: 2+ What is the concentration of Ca²* required (molarity) in a solution that is 0.0012 in F¯ in order…

A: Ksp is the product of concentration of ions of sparingly soluble salt

Q: values if needed for this questio Consider the following system at equilibrium where AH° = -111 kJ,…

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Q: How would you name the compound shown below? Choose the BEST answer. H. H. H H. | | | Н— С—С— с— с…

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Q: H.W) 1013.25 J of heat energy is supplied to 1mol of NH3 (2) which is initially volume is 4L at…

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Q: QUESTION 4 MgtOH)2 reacted with dilute hydrochloric acid as following equation. Mg(OH)2(s) +…

A: Given, Mg(OH)2(s) + 2HCl(aq) → MgCl2(aq) + 2H2O(l) concentration of HCl solution = 0.5 M = 0.5 mol/L…

Q: How many atoms of oxygen (O) are there in a sample of (6.30x10^2) grams of NaNO3? Enter your…

A: Number of moles of a substance = Amount of substance/ molar mass of substance   1 mole of a molecule…

Q: A student ran the following reaction in the laboratory at 1083 K: 2S03(g)2s02(9) + 02(9) When she…

A: Equilibrium constant is defined as ratio of equilibrium molar concentration of product raised to…

Q: 34. The following molecule is Na,Cr207 COOH H2SO, H20 I3D IV

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Q: Calculate the standard enthalpy for the following reaction at 25°C: C(graphite) + H20(g) → CO(g) +…

A: The enthalpy of the formation of the element or molecule at its their standard state is zero.  Like…

Q: Shania looks for the conjugate acid-base pairs. Which of the following is the conjugate base of…

A: When acid is dissolved in water ,it releases proton and there is formation of conjugate acid base…

Q: The value of K,, for water at 0 Cis 1 x 10 15b What is the pOH of water at 0°C? 6.5 7.0 7.5 8.0

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Q: Which of the indicated protons would have the smallest pKa value? H. a. CH3 C C-H H. H. d. b. a O b

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Q: What is the pH of a 0.015 M aqueous solution of barium hydroxide? A) 12.18 B) 12.35 C) 1.82 D)…

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Q: A saturated solution of Pb(OH)2 was found to contain 4.1x10-8 mol OH in 100.0 mL. Calculate the Kep…

A: 1.) To calculate Ksp, we would write dissociation equation of Pb(OH)2 and write it's ksp expression.…

Q: Give the IUPAC names of the following(skip e) CI 2-chloró-4-ethylheptane a) b) c) d) = f)

A: IUPAC name are as follows:

Q: Janice observed a reaction during lab. She noted that the entropy value was negative, and the…

A: Spontaneous reactions can be defined as the reactions that occur by itself without any external…

Q: All of the following statements are false for the spontaneous combustion of hydrogen gas at 400 K…

A: Given: Spontaneous combustion of hydrogen gas at 400 K  For a reaction to be spontaneous, ∆G < 0…

Q: Consider the reversible reaction between nitrogen and hydrogen gases shown below. → 2NH, (e) ^2 «) +…

A: Given data Reaction: N2  + 3 H2 ⇔ 2 NH3 And initially only Nitrogen and Hydrogen are present We…

Q: Which of the following is NOT true for light modeled as a wave? O Wavelength is the distance between…

A: Here give light act as wave.

Q: 16. What is the pH of an aqueous solution at 25.0°C that contains 3.98x10-9M  hydronium ions H+ ?…

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Q: Chloride ions are added to the Ag|Ag half-cell of the cell Ag|Agl|CuCu to precipitate AGCI (s). The…

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Q: 0.096L of a 2.9M solution is diluted to a final volume of 250mL. What is the resultant molarity?

A: The no of moles of the solute remains same even if we dilute the solution.  The molarity is defined…

Q: Cd2* forms a stabie complex with EDTA. Consider the titration of 30.00 ml of 0.0525M Ca with 0125 M…

A: The reaction that takes place is: Cd2+  +  EDTA  →  [CdEDTA]2− 30.00 mL of 0.0525 M Cd2+ reacts with…