A discovery revealed a parchment fragment that had about 64% as much 14C radioactivity as does plant material on the earth today. Estimate the age (in years) of the parchment. (Round your answer to the nearest hundred years.) 2.

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A: Given Data : 1.moles of oxygen = 4.1 mol  2. Mole of lead = 4.11 mol Chemical formula = PbOx

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Q: The a-decay of 238U (t,/2 = 4.47x10°y) leads to 234TH (t/2 = 24.1d). A sample of uranium ore should ...

A: Given, α decay of U238 to T234h. The isotopic abundance of U238 (natural) = 99.3 %

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Q: mL of the concentrated solution are

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Q: atomic mass

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Q: You run the following reaction. Upon completion and isolation of the product you take the following ...

A: Given NMR data: A signal at near 200 ppm is belongs to Carbonyl carbon (C=O).  5 peaks at region 125...

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Q: pH of farm field Measurement pH 1 7.05 2 6.89 6.92 4 5.88 6.34 6.45 7.10 8. 5.89 6.58 10 6.71 4) A s...

A: The formula to calculate average of measurement is :-  Average = sum of each measurements ÷ number o...

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Q: Two 21.0 mL samples, one 0.100 mol L¬'HCl and the other 0.100 mol L¬'HF, were titrated with 0.200 mo...

A: A.).B)  Equivalence point is the point of neutralization of H+ and OH- ions.  At this point moles of...

Q: Question 9 Which one of the following statements is FALSE? In a TLC experiment with amino acids, if ...

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Q: A bicyclist is stopped at the entrance to a valley, as sketched below: E Where would the bicyclist h...

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Q: A common laboratøry preparation of ørygen gas is the thermal decomposition of potassium chlorate (KC...

A: Given :-  KClO3 → KCl + O2  Mass of KClO3 = 28.57 g  To calculate :-  Mass of O2 (in g)

Q: Exam What mass of C6H1206 (glucose) is needed to prepare 450. mL of a 0.650 M solution of glucose in...

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Q: Consider the hypothetical cations, A* and C* and anions, B¯ and D'. Calculate the AG when 20.0 mL of...

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Q: Determine the heat of reaction for the decomposition of calcium carbonate CaCO3(g) → CaO(s) + CO2(g)...

A: Determine the heat of reaction for the decomposition of calcium carbonate CaCO3(s) → CaO(s) + CO2(g)...

Q: • Show the major product(s) from the reaction of the following substances with (1) CH;CH,CI, AICI, a...

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Q: 2NO2(g) → 2NO(g) + 02(g) It follows this reaction mechanism: NO,+NO 2NO+O2 2NO2 Progress of reaction...

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Q: Assuming 100% dissociation, 1.0 mol of NaBr dissolved in 250 g of water [ Select] have the same coll...

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Q: The energies, E, for the first few states of an unknown element are shown here in arbitrary units. 1...

A: An electron will absorb the energy to go the next higher energy level. The energy of electron ejecti...

Q: A solution contains 1.01x10-2 M silver acetate and 8.49x10-3 M iron(II) nitrate. Solid potassium hyd...

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Q: Part B 8.10x10 kJ/mol Submit Request Answer • Part C 1860 kJ/mol t

A: E= hc/wavelength

Q: Zinc dissolves in hydrochloric acid to yield hydrogen gas: Zn(s) + 2HCI(aq) → ZnCl2(aq) + H2(g) What...

A: Using stoichiometric ratio we can determine how many moles of each reactant reacts . From that we ca...

Q: Methane and hydrogen sulfide react to form hydrogen and carbon disulfide, like this: CHĄ(9)+2H,S(g) ...

A: As per balanced reaction, 1 mmol of CH4 reacts with 2 mmol of H2S to form 4 mmol of H2. So, 235 mmol...

Q: A voltaic cell consists of a Zn/Zn²+ half-cell and a Ni/Ni²+ half-cell at 25 °C. The initial concent...

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Q: An empty steel container is filled with 5.60 atm of H₂ and 5.60 atm of F₂. The system is allowed to ...

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Q: Check the statements that are true A.) The size of an orbital depends on its orientation B.) A quant...

A: In this Question, we have to check the statements that are True.

Q: A certain shade of blue has a frequency of 7.21 x 1014 Hz. What is the energy of exactly one photon ...

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Q: In the reaction Pb(s) + 2Ag1(aq) -----> Pb21(aq) + 2Ag(s) Which species is oxidized and which is re...

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Q: Anna B. wants to determine what type of wave is emitted when a hydrogen electron passes from level 6...

A: We should be aware of wavelengths of electromagnetic spectrum.

Q: What is the rate of reaction in terms of C in the following reaction: A + B 2 C. O a. +A[C]/2At O b....

A: Reaction  A + B ——————> 2C  

Q: You have a large bottle of 10.0 M HCl and you want to make 400 mL of 1.25 M acid. How much concentra...

A: Given that, M1=10.0 M, V1= ? M2=1.25 M, V2=400 ml  

Q: Which of the following is the characteristic of London dispersion forces? A. The electron cloud of ...

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Q: on A‚G° = -nFEel Calculate the standard Gibbs energy change at 25 °C for the following reaction: Mg(...

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Q: (a) The resonance structures for the given compound, C6H5OH are shown below. j-H ö-H ö-H ö-H :ö-H Ph...

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Q: 7. The five spheres below represent Se, Se?, O, H, and S, not necessarily in that order. 37 pm 72 pm...

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Q: Consider the hypothetical cations, A" and C and anions, B and D. Calculate the AG when 20.0 ml of 0....

A: Gibb's free energy is a thermodynamic potential that can be used to calculate the maximum reversible...

Q: It is the process wherein light elements such as Helium and Hydrogen form. A. Big bang nucleosynthe...

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Q: Consider the following reactions and associated equilibrium constants: A(g) C(g) K. = 1.700 *104 D(g...

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Q: We have assumed [CO32-] << [HCO3] in our precedent calculation and accordingly ignored the [CO3²-] c...

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Q: Consider a voltaic cell with 2 electrodes (one of them is an Aluminum electrode, and the other is Si...

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Q: Calculate straln energy for the conformer plctured below, using straln energy Increments from the ta...

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Q: 4. 14N and 1C have the same number of A. isotopes. B. protons. C. neutrons. D. electrons.

A: Detail solution is given below

Q: Find the product of the following reaction! OH A H.

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Q: Part A Calculate the equilibrium constant for each of the reactions at 25 °C. Pb* (aq) + Zn(s) → Pb(...

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Q: Choose ONE of the following conversion problems to complete. Report your answer with the correct num...

A: 1.)  To convert these values in required units , we would need conversion factors.  We would use dim...

Q: Upon completing a reaction in the lab, you determine the percent yield for the process to be 140%. O...

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Q: РОН 3D 10.8 1.4 x 104 М NaOH 3.1 х 10% М НСІ [Он] %3 1.1 х 10° М [н]3 2.0 х 10м

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Q: Which of the following is NOT true about equivalence point and endpoint? a. The endpoint approximate...

A: Endpoint and equivalent point in a titration are two very important point. Here we have to determine...