Question 4 How many formula units (particles) of sodium hydroxide, NaOH, are found in a 20.0 g sample?

Q: Macmillan Learning Polychlorinated biphenyls (PCBs), which were formerly used in the manufacture of…

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Q: Procedure: Experiment 1. Prepare one of the following solutions: (a) 100mL of aqueous 0.10M NaCl,…

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Q: How many atoms of Oxygen are in 0.560 grams of glucose, C6H12O6 (mm 180.156g/mol) Enter your numeric…

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Q: For equilibrium 2, state one factor why the axial form is more stable than the equatorial form.

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Q: Calculate the molarity of the sulfate ion if 0.46 g SO4 2 is present in 50.0 mL of solution

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Q: write out the mechanism for this reaction.

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Q: Suppose the galvanic cell sketched below is powered by the following reaction: Ni(s) + Pb(NO3)₂(aq)…

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Q: 19.11 Predict the product(s) for each reacti- H3O+ ? (a) 2202209 ed ebanoqmos on nimi sn 29asd nido2…

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Q: Use Coulomb's law to calculate the energy in aJ of the following ions to their equilibrium ion-pair…

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Q: A drink contains 2.80% (w/v) of vitamin C. What volume would you have to ingest to obtain 1000 mg of…

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Q: Ca(s) + 2HCl(aq) --> CaCl2(aq) + H2(g) Using the limiting reactant concept, how many moles of…

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Q: Br NaCN Br KOC(CH3)3 t-BuOH

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Q: What molecular compounds dissolve, what is broken? A. atoms B. chemical bonds C. chemical bonds…

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Q: How many grams of solute are contained in each solution in 330 mL of a 0.34M NaNO3 solution?

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Q: Calculate the equilibrium constant (Keq) for the following reaction. At equilibrium the [N2O4 ] =…

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Q: Draw The Structures?

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Q: 3a. Draw (2S,4R,6R)-6-fluoro-4-isobutyl-2-heptanol. 3b. Draw a diastereomer of the molecule in (3a).…

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Q: Is it spontaneous? 2+ 2Al³+3Zn(s) → 2Al(s) + 3Znac)

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Q: 11. The [Ti(NCS)6]-3 ion exhibit a single absorption band at 544 nm. Calculate the crystal field…

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Q: When ionic compounds dissolve, what is broken? A. ions, B. chemical bonds between ions C. chemical…

A: An ionic bond is a chemical bond which is  formed between two oppositely charged atoms.

Q: The general expression for determining the rate of a first-order reaction: Reaction: A--> B…

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Q: Find ∆H for the conversion of 3.75 mol of the liquid compound A at 215.5 ºC and 1.00 atm to solid…

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Q: To what volume should you dilute 95 mL of a 11.5 M H₂SO4 solution to obtain a 1.75 M H₂SO4 solution?

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Q: The total volume of Hydrogen gas needed to fill the Hindenburg was 2.0 x 10^8 L at 1.0 atm and 25…

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Q: 5 What is the standard enthalpy of formation of this isomer of C₂H₁g (g)? AH; =

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Q: CH3CH₂OH + CH3CH₂ + HO → CH2CHBr + CN- > CH2CHCN + Br CH3CH₂CN + CH3S → CH3CH₂SCH3 + CN™

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Q: Propose a mechanism (all arrow pushing) for the following pericyclic reaction. heat HO

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Q: A reaction generates 0.0179 grams nitrogen gas at 53 Fahrenheit and 604 torr. Calculate the volume.…

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Q: How much heat, in calories, must be added to a 102.0g iron block with a specific heat of 0.449 J/g…

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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.