If a sample of helium gas has a volume of 120 mL and a pressure of 850 mmHg, what is the new volume in Lif the pressure is changed to 425 mmHg at a constant T and n?

Q: The acid dissociation constant K, of trimethylacetic acid (HC(CH;),CO2) is Calculate the pH of a 1.4...

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Q: Part A Since soap and detergent action is hindered by hard water, laundry formulations usually inclu...

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Q: What is the molality of a solution made from 100.1 g of NaCI and 440.0 g of water

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Q: 4 Fe + 30, 2 Fe,O; AS°3ys = - 225 J /K AH® 0.0 0.0 -98.3 kJ/mol What is AS° univ if AS°ys = - 225 J/...

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Q: Solid silver nitrate is slowly added to 75.0 mL of a 0.333 M potassium hydroxide solution until the ...

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Q: A 50.0 mL solution of 0.179 M KOH is titrated with 0.358 M HCI. Calculate the pH of the solution aft...

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Q: What is the kinetic energy of 45-Kg object moving at the speed of 7.0 m/s ? 1150 J 1400 J 1100 J 130...

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Q: sample gas has a pressure of 756 mmHg in a 125 mL flask. The sample gas is transferred to a new cont...

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Q: What reaction converts 1-bromo-3-nitrobenzene to 3-bromoaniline Alkylation Acylation Halogenation H...

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Q: 2. In the pH metric titration of strong and weak acid mixture against strong alkali, generally first...

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Q: Draw the enantiomers of each molecule. If a molecule does not have an enantiomer, draw the given mol...

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Q: Directions: First, balance each of the chemical equations below.  Then, classify each reaction as sy...

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Q: Calculate AH° for the following reaction 3 Fe2O3(3) + CO(g) → 2 Fe3O4(s) + CO2(g). Species |AH"f, k ...

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Q: A) Explain the differences between the following: (a) Aldoses and ketoses (b) Reducing sugars and no...

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Q: Which of these salts are acidic in aqueous solution 1)CsCN 2)NaF 3)NH4I 4)NaCl 5)KI 6)NaBr

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Q: If 24.5 mL of a 0.145 M NaOH solution are needed to neutralize 0.520 g of an unknown monoprotic acid...

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Q: The ionization constant, K for HCN(aq) is 7.7 x 10 10, What is the pH of a 0.17 molar solution of so...

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Q: Time to play Matchmaker! These problems and solutions go together like peanut butter and jelly! Each...

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Q: Calculate the [F] for a saturated solution of PBF2 in water. (Ksp = 4.0 x 10*) %3D

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Q: 1. How many moles of gas will occupy 112 mL at 0.975 atm and 23.0 °C? 2. If the gas collected in qu...

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Q: Q2) Consider the following third order reaction: A→ product The following is the integrated rate law...

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Q: Draw the structure of the product of each reaction below. Also, for each reaction, estimate the mech...

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Q: The base protonation constant K, of azetidine (C;H,NH) is 1.5 × 10-8. Calculate the pH of a 0.31 M s...

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Q: When 2.76 g of cesium perchlorate (CsClo,) is dissolved in 103 g of water in a styrofoam calorimeter...

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Q: calculate the following: Vos = 20.20 ml (Cro.') = 0.1350 M (Ag') = 0.202 M Kıp = 1.17x 101 M a) Bala...

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Q: Determine the molar concentration of Ag+(aq) ions in a 2.00 M solution of AgCl2- with no excess chlo...

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Q: Is the AS positive or negative for the following reaction 02(g) + 1/2 02(g) → 03(g) O AS doesn't cha...

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Q: From the following heats of combustion, CH3OH(1) + 02(g) → CO;(g) + 2H,O(1) AH =-726.4 kJ/mol rxn C(...

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Q: 4. You have two reactions: A + B 2 C K1 CA + B K2 How are K1 and K2 related? a) K2 = 1/K1 b) K2 = (1...

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Q: The partial pressures of the following reaction are given H,(g) + 1/2 0,(g) → H,0(g) H,(g) = 0.50 at...

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Q: What is the volume (in units of m^3) and density (in units of g/mL) of a 325g rectangular block of m...

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A: Grignard reaction is an organometallic chemical reaction alkyl, aryl, vinyl or aryl magnesium halide...

Q: sketch conc. aqueous sodium stearate solution with grease in it

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Q: 5. Provide the starting material(s) or product for the following reactions: a) catalytic NaOCH3 + H2...

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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.