Answer Q45, 46, 47 The equilibrium composition of the mixtureat 425°C will be independent of the pressureThe vessel will coutain hydrogen, iodine andA Which of the following statements about thediagram above are true?When A andB are mixed, there will be an increasein vapour pressureThis type of curve could be obtained if A werecarbon tetrachloride and B ethanol3.will have a volume greater than 60 em1.LAThydrogen iodideWhen dynamic equilibrium is attained thecomposition of the mixture remains constantWhich of the following processes representman12gA mixture of 30cm of A and 30em of B47.(B)oxidation?carbNa' +e - NaBr +e Br2S,0 -- S,02 +2eV46.If hydrogen io fide is heated in a closed(C)vessel to a temperai ire of 425°C and thenmaintained at 425°C2.carb(D)mancarbInstructions for questions 48-50Each question in this seciion consists of a statement in the left-hand column followed by a secondstatement in the right-hand column. Decide whether each statement is true or false, then if both are true,hether the second statement is a correet explanatinn of the first Then choose rine response from A to lDaccording to the following code:2.carbsoithFirst Statement Second statement(A))TrueSecond statenment is a correct explanation of the firstATruestatementSecond stateient is NOT tlhe correet esplanation ofthe first statenentTrueTrue3.IsTrueFalse(A)DFalseTrue(B)First statementSecond statement(D)48.Reaction cate of a second order Collision frequency increased withincrease4.reaction increase with concentration of concentration of reactants.reactantsWh49.Aniline. C.IINH reacts with ce-Aniline is a primary aomatie amineGA)(C)5.cold nitrous acid liberating nitrogen andforming phenalCarbon tetruchloride,CCla is aliquid while lead tetrachloride, PbCla is a increases with increasing atomic number.solid with higlı melting pointgiveabu50.In group IV al the Periodie Table metallic characterPb-(A)(C)6.(A)(B)(C)(Dhyo579. The atomic number of an element is:Number of electrons in á neutral atomNumber of protons in the nucleusNumerical position of the element in the39.(lir).+41,0aIhe reducmg agent is(A) Mn (B) Ha) Fen (D) Mn0Which of the following experimentalPeriodic Table35.The melting points of magnesium oxide40.measure the rate of reaction between Cr.0 and (MgO) and barium oxide (BaO) are 3173 K andMnO)2Mnt) + 16Hg) + 50,0techniques may NOT be conveniently used to (MeO) and barium oxide (BaO) are 3173 K andand2196 K respectively. This is because:in acid medium? The cquation isTlhe barium ion is a smaller jon than themagnesium ionThe molar masses of the oxides are differentMagnesium ton has a high charge densityTeading to some covalent character41.methylamine dissolves in waterCH,NH, +H,0 =CH,NII + OH-Base 1 Acid 2 Acid 1 Base 2CHNH, is Lewis baseOH is a conjugate base of HyOCH NH/CH NH, is an acul/tbase conjugatepair- 2Mn + 10C0,+ NII,0(A) Titration (B) Colorimetry(C) Dilatometry D) Conductimetry3Which of the following equilibrium reactionsThe equilibrium below is ohtained when36.IS NOT affected by a change in pressure?2NO = N,04tan)NO + CO =2 Ne + COeB.(3)(C)N) + 3He) 2NIIe)(D)Question 37 and 38 refer to the electronicLontigarations below. Nitrogen has five valenceThe clements m the series Se to1Are callea d-block elementsAre all metals of high melting pointsHave an incompletely filled 3d suh-shell42.electrons.Considerthefollowngelectron2.with the exception of Cu and ZnThe ionization energy of a hydrogen alom isEnergy jump in the Balmer seriesObtained from the line enission spectrum of2p43.112.hydrogen gas3.Obtained at the beginaing of the nti37. Which epresents the grixtmd tatenitiogen?44.Which of the following statenicus apply tothe ethene (CHa) molecukeThe H-C- H bond angles are tetrahedralFour electrons are involved in bonding in the(B) (C)(D)Which represents the electron arrangement forN jon?(A) AB) (C)21carbon-carbon bondIt is planar in shape /38.3.(D)45.Instructions for questions 39-47 (NINE questions).In this section, ONE or MORE of the options givenmay be correct. Select your answer by means of thefollowing code.IL I and 2 only are correctIf 2 and 3 only are correctI13 only is correctle avTHD

Q 45). The diagram shows the deviation from Raoult's law. These types of deviations are called +ive…

The equilibrium composition of the mixture at 425°C will be independent of the pressure The vessel willcoutain hydrogen, iodine and Which of the following statements about the L diagram above are true? When A and B are mixed, there will be an inerease in vapour pressure This type of curve could "be obtained if A were carbon tetrachloride and B ethanol hydrogen iodide When dynamic equilibrium is attained the composition of the mixture remains constant Which of the following processes represent A mixture of 30cm' of A and 30cm of B 47. oxidation? Na +e Na Br +e Br 25,0 will have a volume greater than 60 cm' 46. If hydrogen io fide is heated in a élosed vessel to a temperai ire of 425°C and then maintained at 425 C 2. S,0 +2eV Instructions for questions 48-50

The equilibrium composition of the mixture at 425°C will be independent of the pressure The vessel willcoutain hydrogen, iodine and Which of the following statements about the L diagram above are true? When A and B are mixed, there will be an inerease in vapour pressure This type of curve could "be obtained if A were carbon tetrachloride and B ethanol hydrogen iodide When dynamic equilibrium is attained the composition of the mixture remains constant Which of the following processes represent A mixture of 30cm' of A and 30cm of B 47. oxidation? Na +e Na Br +e Br 25,0 will have a volume greater than 60 cm' 46. If hydrogen io fide is heated in a élosed vessel to a temperai ire of 425°C and then maintained at 425 C 2. S,0 +2eV Instructions for questions 48-50

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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1.37 Calculate the Unsaturation Index of each Compound ( b = 1.37 ppm, resonances singlet, 9H Compound 17a. C,H,,O2 Unsat. Index (2C + 2 - H - X + N)/2 = Ja=11.28 ppm, singlet, 1H 8, ppm 11.28 2.5 2.0 1.5 3.5 3.0 5.5 5.0 4.5 4.0 8.0 7.5 7.0 6.5 6.0 of 12.0 11.5 11.0 10.5 10.0 9.5 9.0 8.5 1) SOCI2; 2) NH3 (excess) 3) Br2, NaOH, H2O 1.15 b = 1.15 ppm, singlet, 9H Compound 17b. C,H,,N Unsat. Index = (2C + 2 - H - X + N)/2 = a = 3.96 ppm, 1 singlet, 2H 8, ppm 3.96 10.5 10.0 9.5 9.0 8.5 8.0 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 8 in
You have obtained a gas chromatogram of a two component mixture of compounds A and B. The height of peak A is 3.84 cm. and the width at half height is 1 cm. The height of peak B is 3.49 cm. and the width at half height is 1.36 cm. The percentage of a component in the mixture is proportional to peak area. Estimate peak areas by multiplying height by width at half height. What was the percentage of compound B in the mixture? (Enter your answer as a number without any percent symbol or the word percent.)
1. The mobile phase in the TLC simulator uses a mixture of the organic compounds: ethyl acetate and hexane. For each compound: circle the polar and nonpolar regions of the molecule, then label each region with the type of attractive force it could use to interact with neighboring molecules. ethyl acetate H :0: Η Η +4 Η H- H Η hexane H- Η Η Η Η Η Η C -C-H H H H H H H
P1V1/T1=P2V2/T2
Chemistry 0.1237 (±0.0001) g of sodium carbonate (Na2CO3) required 22.46 (±0.02) cm3 of aqueous HCl for complete neutralisation. Determine the concentration of the HCl in mol dm–3 together with its uncertainty in mol dm–3 to an appropriate number of digits. You may assume the error in the molar mass of Na2CO3 is negligible.
Match three steroid structures shown below to the following values for Ahexane: Compound A, 275 nm; B, 304 nm, and C, 356 nm. max CH19 C9H19 C3H17 H3C H3C HO
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Na2SO3Na2SO3 reacts with HClO4HClO4 according to the reaction Na2SO3(aq)+2HClO4(aq)⟶2NaClO4(aq)+H2O(l)+SO2(g)Na2SO3(aq)+2HClO4(aq)⟶2NaClO4(aq)+H2O(l)+SO2(g) You wish to provide a 50% excess of 5.955.95 wt% aqueous HClO4HClO4 to react with 30.030.0 mL of 0.07740.0774 M Na2SO3Na2SO3. Calculate the mass of the 5.955.95 wt% aqueous HClO4HClO4 solution required to provide the 50% excess. mass: