Chemistry concepts and calculations

Which sequence represents the best synthesis of 4-isopropylbenzonitrile? Please

Which sequence represents the best synthesis of 4-isopropylbenzonitrile? Please please please explain! a. 1. Benzene + (CH3)2CHCL, AlCl3 2. Br2, FeBr3 3. KCN b. 1. Benzene + (CH3)…

Which series of subshells is arranged in order of increasing energy in a multipl

Which series of subshells is arranged in order of increasing energy in a multiple-electron atom? 4f 5d, 6s, 6p 6s, 6p, 5d, 4s 4f 6s, 5d, 6p 6s, 4f 5d, 6p 5dt 4f 6s, 6p 35. How man…

Which set correctly defines the v quantum numbers of a harmonic oscillotor wavef

Which set correctly defines the v quantum numbers of a harmonic oscillotor wavefunction? a. 1, 2.3,4 b. 0,1.2.3- c- 1,3.5,7- d. 0,2,4,6- 18) Which of the following statements is i…

Which set has the correct order of decreasing first ionization energy? Please ex

Which set has the correct order of decreasing first ionization energy?  Please explain Which set has the correct order of decreasing first ionization energy? O < Br < Ba &lt…

Which set of compounds would form a buffer in aqueous solution? Drag each item t

Which set of compounds would form a buffer in aqueous solution? Drag each item to the appropriate bin. Reaction in a buffer solution When an acid or a base is added to a buffer, a…

Which set of equipotential surfaces matches this electric field? When a positive

Which set of equipotential surfaces matches this electric field? When a positive charge moves in the direction of the electric field. the field does positive work on it and the po…

Which set of reagents are needed to carry out rise following transformation? BH_

Which set of reagents are needed to carry out rise following transformation? BH_3 H_2O_2/^-OH Hg(OAc)_2/H_2O, NaBH_4 DBU H_2SO_4/H_2O NaOH HBr NaOH All will work What is the produ…

Which shape is polar and which non polar: 1- trigonometry bipyramid 2- seesaw 3-

Which shape is polar and which non polar: 1- trigonometry bipyramid 2- seesaw 3- t-shape trigonal bipyramid 4- linear trigonal bipyramid 5- octahedral 6- square pyramid 7- square …

Which should be test soluble in water? What major intermolecular force contribut

Which should be test soluble in water? What major intermolecular force contributes to NaCl dissolving in water? dipole-dipole forces hydrogen bonding ion-dipole force dispersion f…

Which should be the coefficient of hydrogen, H 2 , in the following equation in

Which should be the coefficient of hydrogen, H2, in the following equation in order to make it balanced? 2 Al + 3 H2SO4 ---> Al2(SO4)3 + ? H2 Magnesium reacts with oxygen to fo…

Which signal(s) remain(s) when a DEPT-90 spectrum is run? CH CH_2 a, b, c CH_3 W

Which signal(s) remain(s) when a DEPT-90 spectrum is run? CH CH_2 a, b, c CH_3 Which of the following occurs when a DEPT-135 spectrum is run? Carbon signals are absent CH_2, CH ca…

Which solubility rule is incorrect unless the anions are pairs with the alkali m

Which solubility rule is incorrect unless the anions are pairs with the alkali metals or ammonium ion? Carbonates are insoluble. Hydroxides and oxides are soluble. Phosphates, ars…

Which solution below would have the greatest buffering capacity? The solution wa

Which solution below would have the greatest buffering capacity? The solution was prepared from a weak base and the salt of its conjugate acid. 0.1200 M (CH3)3N and 0.1200 M (CH3)…

Which solution containing an equal number of moles of each of the substances is

Which solution containing an equal number of moles of each of the substances is a buffer? A) H_2SO_3 and H_2SO_4 B) KBr and HBr C) H_2CO_3 and NaHCO_3 D) Na_2HPO_4 and H_3PO_4 E) …

Which solution contains smallest mass of glucose? please show calculations Which

Which solution contains smallest mass of glucose? please show calculations Which solution contains the smallest mass of glucose (MM = 180. g/mol)? 100.0 mL of a 1.0 m solution of …

Which solution has the highest pH? (A) 0.10 M HBrO_3 (B) 0.10 M HBrO_4 (C) 0.10

Which solution has the highest pH? (A) 0.10 M HBrO_3 (B) 0.10 M HBrO_4 (C) 0.10 M NaCN (D) 0.10M NaHCOO For the equilibrium shown below, what are the conjugate acid/base pairs? HF…

Which solution has the lower pH? a. 0.1 M HCl or 0.1 M HC_2 H_3 O_2 b. 0.1 M NaO

Which solution has the lower pH? a. 0.1 M HCl or 0.1 M HC_2 H_3 O_2 b. 0.1 M NaOH or 0.1 M NH_3 (aq) c. 0.1 M Na_2 CO_3 or 0.1 M NaCl Acetic acid, HC_2 H_3 O_2, is a weak acid tha…

Which solution has the same number of moles of NaOH as 50.00 mL of 0.100 M solut

Which solution has the same number of moles of NaOH as 50.00 mL of 0.100M solution of NaOH? 100.00 mL of 0.0500M solution of NaOH 50.00 mL of 0.125M solution of NaOH 30.00 mL of 0…

Which solution is basic? A) pH = 3.00 B pH = 10.00 C) pH = 5.00 D) pH = 1.00 E p

Which solution is basic? A) pH = 3.00 B pH = 10.00 C) pH = 5.00 D) pH = 1.00 E pH = 4.00 What is the pH of a 0.056 M HNO_3 solution? A) 0.056 B) 2.88 C) 12.75 D) 1.25 E) 11.11 Whi…

Which solvent is suitable for an S_N2 reaction mostly? a) ethanol b) acetone c)

Which solvent is suitable for an S_N2 reaction mostly? a) ethanol b) acetone c) water d) water 19. Which one would be the major product of the following reaction? (2R, 3S) 3-Bromo…

Which sorting algorithm would you use for the following cases? a) The array is a

Which sorting algorithm would you use for the following cases? a) The array is almost sorted. b) The array is sorted in reverse order. c) Sorting student ids (1000nnnnnn). d) Sort…

Which species acts as a Lewis base? CH4 PH3 H+ NH4+ Which experiment is shown in

Which species acts as a Lewis base? CH4 PH3 H+ NH4+ Which experiment is shown in the diagram? The titration of a weak acid by adding a strong base The titration of a strong base b…

Which species acts as a Lewis base? CH4 PH3 H+ NH4+ Which experiment is shown in

Which species acts as a Lewis base? CH4 PH3 H+ NH4+ Which experiment is shown in the diagram? The titration of a weak acid by adding a strong base The titration of a strong base b…

Which species in the reaction below undergoes reduction? H_2O(g) + CO(g) rightar

Which species in the reaction below undergoes reduction? H_2O(g) + CO(g) rightarrow H_2(g) + CO(g) According to the Bohr model for the hydrogen atom, the energy necessary to excit…

Which species is acting as an Arrhenius acid in the following equilibria? a. BH_

Which species is acting as an Arrhenius acid in the following equilibria? a. BH_3 + NaH = BH_4^- + Na^+ b. AICI_3 + Cl^- = AICI_4 c. HNO_2 (aq) = NO_2 (aq) + H^+ (aq) a. H_2 O in …

Which species is the most powerful reducing agent at standard conditions? 2. For

Which species is the most powerful reducing agent at standard conditions? 2. For this galvanic cell reaction, the Nernst equation implies that the galvanic cell will have a more n…

Which specific bonds of the following compounds arc polar covalent bonds? Draw v

Which specific bonds of the following compounds arc polar covalent bonds? Draw vector-annotated three-dimensional diagrams to determine which compounds have a nonzero molecular di…

Which spectroscopy, IR or NMR would you use to distinguish between (it may help

Which spectroscopy, IR or NMR would you use to distinguish between (it may help to draw the structures of the molecules) a. 2-butanol and 2-butanal (for full credit explain what d…

Which state is correct? What is the strongest acid? What is the oxidation number

Which state is correct? What is the strongest acid? What is the oxidation number of Mo in MoO_4^2? What is the solubility product expression for Ag_3PO_4? Which pair forms a buffe…

Which statement (s) is(are) true for photomultiplier tubes? Photo multiplier tub

Which statement (s) is(are) true for photomultiplier tubes? Photo multiplier tubes are very sensitive detectors, amplifying the photoelectron current by approximately 1 million. E…

Which statement A-D about molecular representation is not correct Molecules are

Which statement A-D about molecular representation is not correct Molecules are represented in various ways. Which statement A-D about molecular representation is not correct. A s…

Which statement A–D about VSEPR theory is not correct? The molecular shape or ge

Which statement A–D about VSEPR theory is not correct? The molecular shape or geometry can differ from the electron-pair geometry. In VSEPR theory, the shape or geometry of a mole…

Which statement A–D about the wave function for a single electron is not correct

Which statement A–D about the wave function for a single electron is not correct? a. A French graduate student named Louis de Broglie first had the idea that an electron should be…

Which statement A–D about the wave function for a single electron is not correct

Which statement A–D about the wave function for a single electron is not correct? A French graduate student named Louis de Broglie first had the idea that an electron should be de…

Which statement BEST explains why the P/O ratio for NADH is higher than that of

Which statement BEST explains why the P/O ratio for NADH is higher than that of FADH2? Which statement BEST explains why the P/O ratio for NADH is higher than that of FADH2? The r…

Which statement about H_2 O is false? a. It is both acidic and basic b. It will

Which statement about H_2 O is false? a. It is both acidic and basic b. It will dissolved most ionic compounds c. H_2 O boils at a relatively high temperature due to hydrogen bond…

Which statement about Km is FALSE? Km is substrate concentration at which the en

Which statement about Km is FALSE? Km is substrate concentration at which the enzyme operates at half-maximum velocity. The Km of an enzyme can be determined from a Michaelis-Ment…

Which statement about VSEPR theory is not correct? In VSEPR theory, the shape or

Which statement about VSEPR theory is not correct? In VSEPR theory, the shape or geometry of a molecule is determined by electron–electron repulsion. The steric number has five va…

Which statement about a cathode in a voltaic cell is not correct? a. Oxidation o

Which statement about a cathode in a voltaic cell is not correct? a. Oxidation occurs at the cathode. b. Reduction occurs at the cathode. c. Usually the cathode is a metal strip. …

Which statement about a chemical reaction is not correct? Please, can you explai

Which statement about a chemical reaction is not correct? Please, can you explain why? a) All chemical reactions are reversible since products can be converted back into the react…

Which statement about an instantaneous dipole is not correct? A) An instantaneou

Which statement about an instantaneous dipole is not correct? A) An instantaneous dipole is a temporary dipole formed by the movement of electrons within a molecule. B) London for…

Which statement about assigning electrons to orbitals in the energy diagram is n

Which statement about assigning electrons to orbitals in the energy diagram is not true? Electrons will always go to their lowest possible energy state. It is preferable not to pu…

Which statement about balanced chemical equations is false ? The total number of

Which statement about balanced chemical equations is false ? The total number of atoms in the reactants must equal the total number of atoms in the products The total number of mo…

Which statement about balanced chemical equations is false? Calcium oxide, when

Which statement about balanced chemical equations is false? Calcium oxide, when dissolved in water, gives a solution which is: Four students, A thru D, determined the molarity of …

Which statement about carbon is not correct? Carbon is a key element for life. C

Which statement about carbon is not correct? Carbon is a key element for life. Carbon forms a wide variety of bonds to itself and other elements. is the answer b or c? Which state…

Which statement about cellulose is false? It is the most abundant polysaccharide

Which statement about cellulose is false? It is the most abundant polysaccharide in nature. It is present in the stems of flowering plants. Its monomers are joined by glycosidic b…

Which statement about chemical equilibrium is not true? A. At equilibrium, the r

Which statement about chemical equilibrium is not true? A. At equilibrium, the reactant and product concentrations are constant. B. The same equilibrium state can be attained star…

Which statement about functional groups is false? (a) A functional group in an o

Which statement about functional groups is false? (a) A functional group in an organic comppound typicallydictates its chemical properties (b) Ethane and methane are examples of f…

Which statement about hydrogen bonding is true? a) Hydrogen bonding is the inter

Which statement about hydrogen bonding is true? a) Hydrogen bonding is the intermolecular attractive forces between two hydrogen atoms in solution. b) The hydrogen bonding capabil…

Which statement about hydrogen bonding is true? a) Hydrogen bonding is the inter

Which statement about hydrogen bonding is true? a) Hydrogen bonding is the intermolecular attractive forces between two hydrogen atoms in solution. b) The hydrogen bonding capabil…