What answer should be reported, with the correct number of significant figures, for the following calculation? (249.362 + 41) / 63.498 The answers 4.6 and 4.5728 are both marked as wrong.

Q: 6.53 Calculate the heats of combustion for the following reactions from the standard enthalpies of…

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Q: For each compound in the table below, decide whether there would be any hydrogen-bonding force…

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Q: Consider the reaction A(g) ⇌ 2B(g) + C(g), K = 2.12 x 10-2. The reaction is at equilibrium at in a…

A: Given A(g) ⇌ 2B(g) + C(g), K = 2.12 x 10-2. The reaction is at equilibrium at in a 1.00 L

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Q: What is the mass in grams of 5.51 x 10^25 molecules of N₂?

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Q: 5. Properties and IMF: Chlorophyll a and Chlorophyll b are almost identical in structure, but they…

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Q: QUESTION 6 What mass of ethane, C2H6, contains the same number of molecules as 3.00 g of…

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Q: Use Slater's rules to calculate Zeff for the outermost electron of F (2p)

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Q: Q: What ester results in the following reflux? pentanoic acid O OH CH3CH₂OH Q: What alcohol and acid…

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Q: How many particles of copper (II) oxide were there if you have 12.3g of carbon dioxide were…

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Q: What is incorrect about this electron configuration? Give the correct electron configuration. Assume…

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Q: What is the strongest IMF in pure 2-octanone? I know it is a ketone and has some polarity due to…

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Q: Consider the sublimation of iodine at 25.0 ∘C∘C: I2(s)→I2(g) Find ΔrGΔr� at 25.0 ∘C∘C under the…

A: Given that, at 25°C temperature, the sublimation of iodine is shown below I2(s) → I2(g). We have to…

Q: Name the compounds below according to the IUPAC naming system 5, 2 HHH I C I H-C -C- 40% H HIGIH I…

A: for multiple subparts-" since you posted a question with multiple subparts, we will solve the first…

Q: 8. 2.5 grams of NH4Cl is dissolved in 3 liters of water. The NH4Cl is the solvent b. solute c.…

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Q: Sample Jones Test 1 HO A 2345 2 4 CH3 Blue-green precipitates No reaction No reaction No reaction…

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Q: Draw the Lewis structure created by the curved arrow. Write in formal charges wherever they are not…

A: -> There is resonance if loan pair is conjugated with positive charge or double bond .

Q: When 2.50 g of methanol undergoes complete combustion with excess oxygen 50.8 kJ of heat energy is…

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Q: An organic compound has an empirical formula of CH2O and had an approximate molecular weight of 117.…

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Q: The human body burns glucose (C,H₁206) for energy according to this chemical reaction: CH₁2O6…

A: Given: Volume of air exhaled in one breath is 500mL. Weight of carbon dioxide required by each…

Q: Problem Four Tamoxifen is a breast cancer drug. Identify which geometrical isomer it is by assigning…

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Q: Consider the synthesis of ammonia: N2(g) + 3H2(g) 2NH3(g) - At 896.4 °C, the equilibrium constant…

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Q: Determine the quantity of moles of propylene (C3H6) in 25.0 g of the substance.

A: Since, Moles is the ratio of mass to the molar mass of that atom or molecules. Thus,

Q: A protein's polypeptide chain. O primary O secondary O tertiary quaternary structure contains…

A: Introduction Proteins are complex molecules made from amino acids linked together by peptide bonds.…

Q: The fundamental vibration frequency of H^35Cl is 2989 cm^-1. What is the value of the liaison force…

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Q: 1 IVU TRANSMITTANCE1% D 4000 Но 2 3000 3 2000 4 NAVENUMBERI- 1500 о: 5 1000 6 H ОН 7 500

A: We need to find the molecules indicated by the given IR spectra. IR spectrum provides characteristic…

Q: 14. A CHEM 106 student made a 55.0 % by mass sodium sulfate aqueous solution at 50 °C (Assume the…

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Q: How many moles of NaOH will be needed to neutralize 0.85 mol of H₂SO4? The following equation is…

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Q: r STARTING AMOUNT X E According to the balanced reaction below, calculate the quantity of moles of…

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Q: Carbonate, CO32-, has three resonance structures. Draw these resonance structures and then draw the…

A: Since, Resonance structures are those structure whose molecular formula is same but arrangement of…

Q: Determine the number of atoms of O in 11.8 grams of C6H12O6.

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Q: How many turns does NO make per second in rotation state J=1, J=2? r = 1.151

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Q: 2. Why should anhydrous ether be used as the solvent for the Grignard reaction?

A: Anhydrous ether is used as solvent for the Grignard reaction. The main reasons of using anhydrous…

Q: Mass of benzyl alcohol: 0.4mL 1.04 g = 0.416 g CiH:CHOH 1mL Moles of nitric acid: Nitric acid 1.2mL…

A: The overall reaction taking place is- C6H5CH2OH+4HNO3→C6H5COOH + 4NO2+3H2O

Q: Why does this equation for the electron ratio have two radii (R and r)?

A: In the electron ratio equation, the two radii (R and r) refer to different aspects of the system…

Q: 1. Predict-the-Product Draw the structure(s) of the major organic product(s) formed in the following…

A: we have to draw the major product of the given reaction

Q: The activation energy for the decomposition of hydrogen peroxide is 42 kJ/mol, 2H₂O₂(aq)-> 2H₂O₂(1)…

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Q: How many KCL are produced with 50mL of 1.5 Moles of HCL, and 50 mL of .071 Moles of KOH?

A: If in a reaction 50mL of 1.5 Moles of HCL, and 50 mL of .071 Moles of KOH reacts. We have to…

Q: In a molecular compound can only non-metals bond together?

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Q: Complete each of the following by supplying the missing reagents. Draw the structures of each of the…

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Q: Caffeine has the empirical formula C4H5N2O and an approximate molecular weight of 97.1 g/mol. What…

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Q: When 1246 J of heat energy is added to 40.8 g of hexane, C6H₁4, the temperature increases by 13.5…

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Q: 6. Reaction 2 is a first order reaction with a half-life (t 1/2) of 25.0 s. What is the value of the…

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Q: 5. Consider the sugar below, one of several sugars in the antibiotic elloramycin. a. Draw in all of…

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Q: 7. Consider the reaction: N₂(g) + O₂(g) = 2NO(g); K= 1.0x10-6. Suppose a sample of air contains…

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Q: What is the entropy change when 1.20 moles of CCl₂F2 condenses at 25.0 °C? [AH(vap) = 17.2 kJ/mol at…

A: According to the question, The number of moles of CCl2F2 = 1.20 molesThe temperature is gievn by =…

Q: What is isoelectronic to selenium ion but with opposite charges?

A: As we know that   Iso Electronic species are the species that are having same number of electrons

Q: Rank the carbocations in the table below in order of increasing stability (1 least stable and…

A: The carbocation is stabilized by the hyperconjugation taking place in the molecule.  Therefore,…

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.