Question 9 Dr. Cavendish prepared hydrogen in 1766 by the novel method of passing steam through a red-hot gun barrel: 4H₂O(g) + 3Fe(s) → Fe3 04(s) + 4H₂(g) What volume of H₂ at a pressure of 745 torr and a temperature of 20 °C can be prepared from the reaction of 15.0 g of H₂O?

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Q: A chemist must prepare 800.0 mL of sodium hydroxide solution with a pH of 13.80 at 25 °C. She will…

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Q: #1) Complete and balance the following equations: Mg(OH)2(aq) + HCl(aq) → HI(aq) + H₂SO4(aq) →…

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Q: Draw the skeletal (line-bond) structure of trans-4-methylpent-2- ene. 1 Drawing 1 1 1 1 I

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Q: 1. Draw the Full Lewis chemical structure of a simple ester of your choice containing exactly five…

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Q: 1. For lactose (below), ОН ОН НО НО 0. OH 0 OH OH (A) Circle and label any acetal groups (B) Circle…

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Q: 10) For which salt should the aqueous solubility be most sensitive to pH? A) CaCl2 B) Ca(NO3)2 C)…

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Q: What is the [H+] of a solution whose pOH = 2.11 ?

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Q: c. Identify the cathode and the anode and write their respective half-cell reactions. d. Write the…

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Q: What is the percent dissociation of 0.010 M acetic acid? Data: K₂ = 1.8 × 10-5

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Q: Predict the structure of the starting material used in the halogenation reaction below. I draw…

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Q: A 36.0–L cylinder of a gas used for calibration of blood gas analyzers in medical laboratories…

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Q: 1 microgram = how many grams

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Q: Draw the diagram of the structure of the micelles of a soap in hexane trapping a stain of sweet…

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Q: ✓9 10 A chemist titrates 160.0 mL of a 0.4381 M benzoic acid (HC, H,CO₂) solution with 0.2772M NaOH…

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Q: Balance the following redox reaction in basic solution. 2+ H₂(g)+Zn (aq) → H₂O()+Zn(s)

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Q: VALENCE ELECTRONS FORMULA FROM EACH ATOM H₂ HCI H₂O2 TOTAL # OF VALENCE ELECTRONS LEWIS DOT…

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Q: What invariant reaction is occurring at the point at 1493°C when (L+ 0 → y). Temperature, °C 1600 8-…

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Q: Draw these molecules: 3-Isopropenyl-1.4-cyclohexadiene + (E)-1,2,4-hexatriene 6

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Q: 8 eBook Print References Be sure to answer all parts. Predict the major product of the given…

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Q: Starting with benzene and using any other necessary reagents of your choice, design a synthesis the…

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Q: Draw the structure of butane. Draw the molecule on the canvas by choosing buttons from the Tools…

A: Butane have 4 carbon atoms that are joined through single bond .

Q: Determine AG° for a reaction when AG = -141.5 kJ/mol and Q = 35 at 325 K. (R = 8.314 J/mol. K)

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Q: Evaluate the commutator

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Q: CH,(CH,),CHO OH

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Q: CI 1861 Br from

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Q: 1 2 3 4 Trial 1 31.22 g 31.82 g Mass of porcelain crucible + cover Mass of porcelain crucible, cover…

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Q: 4. How many grams of NaBr (molar mass = 102.9 g/mol)

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A: Molarity is defined as number of mole of substance divide by volume of solution in liter

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.