Perfluorooctanoic acid (PFOA, C8HF15O2) has been raising concerns due to its presence in the environment. How many molecules are present in 82.8 mg of PFOA?

Q: 3. Boron (B; Z=5) has two naturally occurring isotopes. Find the percent abundances of ¹0B and ¹1B…

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Q: Curved arrows are used to illustrate the flow of electrons. Using the provided resonance structures,…

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Q: what happens when you add NaOH vs HCl to sodium phosphate dibasic?

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Q: Curved arrows are used to illustrate the flow of electrons. Follow the curved arrows and draw the…

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Q: 7. nickel and sulfate 8. copper (II) and hydroxide 9. potassium and hydrogen phosphate 10 samt

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Q: Vapor pressure (mm Hg) 900 800 700 600 500 400 300 200 100 0 Carbon disulfide 10 20 30 Methanol 40…

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Q: For the K shell, the four quantum numbers for each of the two electrons in the is state, in the…

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Q: Consider the following structures and list which molecules are capable of hydrogen bonding in a pure…

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Q: How many grams of carbon are in 1.13 x 1025 molecules of (carbon dixide) CO2 ?

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Q: Which of the following organic compounds is in the cis isomer for CH3CH₂CH=CHCH₂? 0 a) b) I H₂CH₂C…

A: Since you have asked multiple type questions, we will solve only first  questions for you. If you…

Q: Describe how you would prepare 200 ml (total volumn) of a solution that is 50% acetic acid by…

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Q: The hydrogen atom has a volume of approximately 6.2 × 10-³1 m³. What is this volume in each unit?

A: 1 nanometer (nm) = 1 × 10-9 meter (m) So,  1 nm3 = (1×10-9 m)3 Or, 1 nm3 = 1×10-27 m3

Q: 85.0-kg person is exposed to 419 rad of radiation. How many joules did this person absorb?

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Q: Which bonding types could be influenced by a moderate change in pH or temperature. Check all that…

A: Which bonding types could be influenced by a moderate change in pH or temperature:

Q: The rate of the reaction A + 3B → C + 2D was reported as 2.7 M/sec.  Calculate the rates of…

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Q: 1. V₂(SO4)3 -> Vanadium (III) Sulphate V₂(SO4)3->2V+3+3(SO 4)-² 2. Zn 3P 2 -> Tri zinc Di phosphide…

A: In solutions( aqueous ) the salt MaNb dissociates in aMb+ (cation) and bNa- (anion). Similar to this…

Q: Which formula represents an unsaturated hydrocarbon? a. C5H12 b. C6H14 c. C7H16 d. C8H14

A: A SATURATED hydrocarbon is defined by the general formula CnH2n+2 (Alkane)  A UNSATURATED…

Q: balancing equation: use coefficient to balance the equation below. please check the screenshot

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Q: a. What equation should the students use to calculate the percent yield?  b. Calculate the percent…

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Q: m/Ind The critical parameters of a gas are Pe=45.6 atm, V-98.7 atmimol and Te-190.6 K. Calcul the…

A: Given : Pc = 45.6 atm              Vc = 98.7 mL/mil              Tc = 190.6 K We know,   Vc = 3b And…

Q: How many molecules are contained in 38.33 grams if NO2? First determine the molar mass of NO2. Can…

A: Given, Mass of NO2 = 38.33 g  Atomic mass of N = 14.0067 g/mol  Atomic mass of O = 15.999 g/mol NA…

Q: Provide the product(s) for the following Diels-Alder reaction. Assume that the conditions are…

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Q: What distance in miles can you drive your new Prius hybrid, if your car gets 56.0 miles per gallon…

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Q: The average molecular speed in a sample of CH4 gas at a certain temperature is 643 m/s. The average…

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Q: 14 If you are making 100 mL of a 0.1 M HEPES buffer starting from HEPES in the basic form, is it…

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Q: type(s) of intermolecular forces are expected between CH3CH₂NH2 molecules? H H tr H H H H Indicate…

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Q: A researcher claims that an ancient scroll originated from Greek scholars in about 500 B.C. Its…

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Q: Which ion has the same number of total electrons as the noble gas argon (Ar)?

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Q: What volume (in L) of 1.50 M Na₂CO₃ would be required to obtain 0.650 moles of Na⁺ ions?

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Q: Use the following vapor pressure data to answer the questions: A B Liquid C₂H5Br CH3OH Vapor…

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Q: Five students performed a Kjeldahl nitrogen analysis of a protein sample. The weight % nitrogen…

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Q: Draw the structural formula of the following compounds. 3-methyl -1- pentyne 2,3,4-chloro octane

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Q: The vapor pressure of liquid cobalt is 400 mm Hg at 3.03x10³ K. Assuming that its molar heat of…

A: Given, P1 = 400 mm T1 = 3030 K T2 = 3050 K □H = 450 kJ/mol Using Von't Hoff reaction  ln(P2/P1) =…

Q: associated with the following: a. Bohr model of the the atom. b. Wave-mechanical atomic model.

A: Bohr Atomic model are wave mechanical models are given to define the structure of an atom

Q: a. Compute the value of kT (in Joules) at 25°C.

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: How many moles are there in 4.586E1 g of chlorine (Cl) atoms?

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Q: b. d. e. II H₂C-CH₂ H₂C- H₂C 0 CH-CH₂ HC—NHẬ -CH3 HC=C-CH₂-OH f. H₂C-NH₂ 37. For each molecule in…

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Q: Curved arrows are used to illustrate the flow of electrons. Follow the curved arrows and draw the…

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Q: "roblem 7.42 (a11) Part A There are two resonance contributors for this molecule. Draw the major…

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Q: List the unique functional groups present on glycerol, myristic acid, and trimyristin

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Q: How many molecules of hydrogen fluoride (HF) are in (2.1x10^-2) moles of hydrogen fluoride (HF)?…

A: Given  2.1×10-2 moles of HF  N0 = 6.022×1023

Q: 2. Find the pH for the following solutions if it contains: a.) 1.8 x 10-6 M Barium hydroxide b.)…

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Q: Try to complete the missing information for these three isotopes using only the data provided.…

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Q: Draw the resonance structure of the following substance. Interactive 3D display mode H₂C 0 CH3

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Q: 2. Draw the following bond-line structures in dash-wedge notation, showing all implied hydrogens.…

A: bond line  is 2 dimensional  representation where as dash wedge is 3 dimensional representation.

Q: 1. Fit a straight line to the following data points using excel program to obtain the concentration…

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Q: Give a clear handwritten answer with explanation...given below some compounds and options....give…

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Q: (a) (b) (c) d[B] dt State the differential equation for given by mass action kinetics. Use the…

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Q: The product of the following reaction is CH, H₂C H.C HC HC HC CH, 1 OH HBr (xs) heat HO HO CH, CH,…

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Q: H C-CEC-CH3

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.