Which of the two samples has a higher mass in g? 10 mol He, or 0.2 mol Pb? O A. He B. Helium is a gas, and lead is a metal Oc. They have the same mass OD.Cannot be determined from the information above O E. Pb

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Q: H₂O (solvent) heat

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Q: What is the mass (in grams) of 14.50 L of propane vapor (C₃H₈) at STP? R = 0.08314 L･bar/mol･K.

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A: First we number the Carbon atoms on the given molecule and determine the R/S configuration at chital…

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Q: D For each of these molecules, draw in the most acidic protons and rank the molecules from most…

A: The proton which give most stable conjugate base after removing of proton is most acidic proton.

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A: A buffer solution has two type -> Acidic buffer -> Buffer solution containing weak acid and…

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Q: Draw the major organic product of the following reactions. Include all arrows and steps

A: Tertiary butoxide is a sterically hindered base and poor nucleophile. So, it favors E2 elimination…

Q: The ionization of p-nitrophenol is shown below (pKa= 7.0) a) At pH 7, what are the relative…

A: #(a): For the weak acid, p-nitrophenol, pKa = 7.0  Given pH = pKa = 7.0

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A: Given : structure of product Tip : oxidative ozonolysis on alkene given carboxylic acid

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Q: 2. A particle compound shows a green flame. a. Using the table below, indicate the range of…

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Q: Part C Draw the major product of the following reaction: и ✓Br₂ -

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Q: 4. Calculate the Eºcell and predict whether the following reactions would occur spontaneously in…

A: Oxidation : Loss of electrons with increase in the oxidation state .Reduction : Gain of electrons…

Q: 3- Give the name of the following cycloalkanes: a CH3 CH(CH3)2 and Br CH3 C(CH3)3

A: IUPAC NOMENCLATURE RULE FOR CYCLOALKANE :

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Q: Specify the reagent you would use in each step of the following synthesis: a. LiAIH4 b. H₂SO4 c. HCI…

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Q: (4) Which of the following is a stronger base? Explain. a. Cl or OH b. CN or F

A: 1. Base is  a substance which have tendency to accept a proton .

Q: In the following reaction, what is the quantity of heat (in kJ) released when 4.93 moles of CH₄ are…

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Q: Determine the volume (in mL) of a 3.07 M solution of ZnBr2 that contains 0.734 moles of ZnBr2.

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Q: Predict the charge. on the predominant species of the peptide E-D-K-R-A-S-T at pH 5.0. charge:

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Q: Question 17 You titrate a 0.125 L of 0.250 M ammonia solution with 0.500 M HCI. What is the pH at…

A: we have to calculate the pH of solution at equivalence point

Q: Question 4 NH3 + 5 02----> 4 NO + 6H₂O What mass of N O (MW = 30.01 g N O) is formed when 100. g of…

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A: Initial concentration of HOCl= 5.1 M Ka= 3.5 x 10-8

Q: How many moles of water, H 2O, are present in 75.0 g of H 2O?     75.0 moles     7.50 moles…

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Q: Bystolic (shown below) is a pharmaceutical used to treat high blood pressure. What is the maximum…

A: Number of stereoisomers = 2 n (Where n = number of stereocenters)

Q: What happens when oxalic acid reacts with potassium permanganate

A: Redox reaction takes place when oxalic acid reacts with potassium permanganate.

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Q: A student dissolves 12.1 g of lithium chloride (LiCl)in 300. g of water in a well-insulated open…

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Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.