Which of the following is not an important assumption of the radiometric age dating method?     Decay occurs at a constant rate   The concentration of parent isotopes starts at zero   The concentration of daughter isotopes starts at zero   Decay occurs in a closed system

Q: UmV for NAD+, fumarate, O2 and ectively, calculate the free energy for a pair of electrons originati...

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Q: Which carbocation is destabilized by a substituent Select the correct response: CH;CHCH,CH2 ČH3 CH3 ...

A: carbocation will be destabilized by an electron withdrawing group. Extensive experimental evidence h...

Q: You have been given an order to prepare 14 progesterone capsules for a patient in your pharmacy. The...

A: No of capsules = 14 Full weight of all capsules = 4.9 g

Q: The mure alkyl substituents to a carbocation, the more stable it is. Select the correct response: O ...

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Q: Rank the following from LEAST TO MOST reactive towards electrophilic aromatic substitution: 1. p-Cre...

A: A question based on aromatic compounds that is to be accomplished.

Q: c) What are essential fatty acids? What type of geometrical isomerism plays a vital role in essentia...

A: These questions are based upon DNA Replication.

Q: Provide strengths analysis for Jollibee Fast Food.

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Q: 5. Calculate the molality of a sulfuric acid solution containing 24.4 g sulfuric acid in 198 g water...

A: Given - - > Mass of sulphuric acid = 24.4 g Molar mass of sulphuric acid = 98.079 g/mol Mass of s...

Q: 1. Balance the following Redox Reactions. Always include the state of each species: (s), (1), (g), o...

A: Balanced the following redox reaction under tge given respective medium ---

Q: Explain why A cross couples with the aryl iodide, rather than two molecules of A coupling together (...

A: Aryl coupling is commonly a cross-coupling reaction. That means the reaction starts when two fragmen...

Q: IR 2-methyl-2-butanol 100 90 70 50 30 20 10 4000 3500 3000 2500 2000 1500 1000 500 Wave Number (cm-1...

A: A question based on IR spectroscopy that is to be accomplished.

Q: Suppose that a device is using a 12.0-mg sample of silicon that is doped with 1 × 10¬°% (by mass) ph...

A: 1 mol contains 6.022*1023 atoms. No of moles = Mass / Molar mass

Q: 1. An alcoholic drink claims 12% alcohol by volume. Calculate the volume in ml of alcohol present in...

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Q: Which of the two has at least one chiral centers? 1,1,2 trimethylcyclobutane or 1,1,3 trimethylcyclo...

A: Given :-  name of compounds :  1,1,2 trimethylcyclobutane 1,1,3 trimethylcyclobutane To identify :...

Q: Calculate the final percent concentration of the erythrocytes in each well: (NaCl, CaCl2, MgCl2) ea...

A: Erythrocyte concentration is 10%. Concentration of each compound = 0.25 M  

Q: N2 (g) + O2 (g) → 2 NO (g) AH°rn = 181 kJ/mol MW O2 = 32.0 g/mol What is the energy change if 12.0 g...

A: N2(g) + O2(g) ---> 2NO(g).      ∆Hrxn = 181 KJ/mole Molecular weight of O2 = 32.0gm/mole Weight o...

Q: The reaction between nitrogen gas and oxygen gas to form nitrogen monoxide has a value for the equil...

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Q: Which of the carbocations will react the fastest in the electrophilic addition of ncl to alkenes? Se...

A: On addition of HCl to alkenes, carbocation intermediate is formed. More stable the carbocation inter...

Q: What is the melting point of Penguinone and how is it extracted?

A: Please find your solution below : Penguinone is an organic compound. Its IUPAC name is 3,4,4,5-tetra...

Q: Determine the pH of a 0.625 M NH3 solution. The Kb of NH3 is 1.85 × 10-5.

A: Given,  The pH of a 0.625 M NH3 solution is: The Kb of NH3 is 1.85 × 10-5.

Q: The compressibility factor for methane is given by Z = 1 + BP + CP2 + DP³. If P is in atm, the value...

A: Given:  

Q: Consider the reaction 2 H, + O, 2 H,0 = -484 kJ Which answer best describes the transfer of heat tha...

A: given H = -484 KJ ( heat released) for 2mol H2 2mol H2  = 484 KJ 1.70 mol H2 = ?

Q: Anna Divi, a young and ambitious researcher, is planning to put up her very own research laboratory....

A: Molality is defined as number of moles of solute dissolved in per kg of solvent.   

Q: It is anything that occupies space and has mass. Atom Matter Molecule Plasma Which of the is under c...

A: 1.   Atom is the smallest particle or the building of the block of element.    Matter is something t...

Q: Comparison and Explanation Melting point: Magnesium chloride and oxalic acid Boiling point: Acetic a...

A: Melting point is the temperature at which solid and liquid phases coexist in equilibrium. Boiling po...

Q: SOLVE ME! 1. Determine S for the reaction: SO:(g) H20(1) → H2SO4(1) Given: S°(J/K.mol): 256.2 69.9 1...

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Q: Zn CHy) HC! LAH

A: Answer: Reagent Zn(Hg)-HCl is actually the reagent of clemmensen reduction by the application of who...

Q: Which of the following compounds is correctly classified as a tertiary alcohol? A) 3-methyl-2-butan...

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Q: Which of the following represents the relative fraction of species as a function of pH for the dipro...

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Q: The compound 1-phenylpropan-2-one can give 2 carbanions. Point out the most stable and the reason?

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Q: Which of the following is produced by hydroxylation of an alkene? Select the correct response: haloa...

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Q: Using ChemDraw, Draw the structures of the three carbonation intermediates that would form if methyl...

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Q: 6. My theoretical yield for a reaction is 163.3mol of Ag and I get 16.6g of Ag, what is percent yiel...

A: Percent yield is calculated using the following formula: Percent yield=Actual yieldTheoretical yield...

Q: Write the rate law for the two elementary reaction equations. 2 A(g)+B(g) –→ C(g)+D(g) rate = k X(g)...

A: Given:-   For Elementary reaction:- •Rate  is equal to product of rate constant with product of con...

Q: The reaction described by the equation 0,(g) + NO(g) 0,(g) + NO, (g) > has, at 310 K, the rate law r...

A: Given: The concentration of O3 at (t = 0 ) =3.0×10-4 M The concentration of NO at (t = 0 ) =6.0×10-5...

Q: At 300 K, a reaction takes 2 hours to complete 50% of the way, but at 320 K, it takes 30 minutes. If...

A: Condition 1 Temperature = 300 K Time 2 hour = 120 min Concentration = half Rate constant = K1 Cond...

Q: 2. If the density of an unknown object was found to be 2.87 x 10 pounds (Ibs) per cubic inch, what i...

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Q: Children's toys and jewelry were assessed for their contarmination by potentially toxic elements (PT...

A: 1 Ppb = 0.000001 mg/g 1 Ppm = 1 mg/L 1 ug = 0.001 mg

Q: give 2 tests to identify the presence of methyl orange

A: Methyl orange shows different colours in acid, base and neutral substance. It changes colour from re...

Q: Arrange the compounds in order of INCREASING reactivity towards bromination. (from LEAST TO GREATEST...

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Q: Determine if aqueous solutions of these salts are acidic, basic, or neutral. a) K2CO3 b) CaCl2 c) KH...

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Q: Name the molecule

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Q: UOmplete the following chemical reaction calalyst b) H3C ~ Ctz t Hz O arid, ) HgC CHs + Hz d H3C VCH...

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Q: Starting from acetylene and alkyl halides not longer than 4 carbon atoms, show the synthesis of 3-oc...

A: NaNH2 acts as strong base and it can abstract proton efficiently from acetylene. BH2/H2O2/OH- is a h...

Q: hydrophobic interactions and charge transfer interactions act to dominate the interactions between p...

A: Molecular interactions are attractive or repulsive forces between molecules and between non-bonded a...

Q: Select the correct response: CH3CHCH,CH2 CH3 CH;CHCH,CH, CH3CH2CHCH3 CH3 CH;CH,CCH3 O CH;CH,CH,ČH,

A: Carbocation is species in which carbon is carrying positive charge. Carbon is sp2 hybridized in carb...

Q: Please help use proper significant figure

A: Entropy of vaporization = 87.30 J/Kmole Enthalpy of vaporization = 33.30 KJ/mole  

Q: The resultant solution had a freezing point of 177.9 °C when 0.270 g of the solute was dissolved in ...

A: The freezing point depression (ΔTf) is related to the molality (m) and the freezing point depression...

Q: 6. How much heat will be released by cooling 52.0 g steam at 225.0°C to ice at -15.8°C? HC

A: Here we have to determine the heat released by cooling 52 gram of steam at 225°C to ice at -15.8°C. ...

Q: Using your fork to separate tomatoes, lettuce, cucumber, onions in your salad is an example of: * Ce...

A: Tomatoes , lettuce, cucumber, onions in salad are having large size.