Question: Fischer projection of D-glucose Haworth (cyclic)

> Label the following molecules as being cis or trans. CI

> Determine the overall charge on each complex. a. hexachloroplatinate(IV) b. triamminetriiodocobalt(III) c. diaquadichloroethylenediaminecobalt(III)

> What is the pH of a solution of 0.054 M propanoic acid? The pKa of propanoic acid is 4.87.

> Which of the following chairs is galactose (Fischer projection drawn)? Are these structures drawn in the alpha- or beta- configurations? ON OH Ow OH но ON OH он HO HO II II IV

> CuO, ionic or molecular KI, ionic or molecular PCl3, ionic or molecular

> Dehydration of 2-methyl-2-pentanol forms one major and one minor organic product. Draw the structures of the two organic products of this reaction. Major Product Minor Product ;ÖH H. H2SO4 H. H H 2-methyl-2-pentanol H H. H

> Select the molecule or ion with the INCORRECT hybridization for the central atom. a. IF2- sp b. 1F4+ sp3d c. IBr4- sp3d2 d. AsF3 sp3 e. Cl2CO sp2

> Which of the following processes are exothermic? A. Rubbing alcohol feels cold on the skin B. Molten metal solidifies C. A match burns

> Is water a good buffering system? Please explain.

> Draw the Lewis dot structure for NaF CaO K2O

> Which of the following processes are exothermic? Select all that are True. crystallization vaporization melting sublimation

> Hydrazine, N2H4, is a base with base strength constant Kb = 10-6.10 M, i.e. for the equilibrium: The equilibrium constant is K = 10-3.15 for the reaction: 4c. Calculate the acid dissociation constant, Ka', for acetic acid, CH3COH NH4 + H2O NHs +

> For a particular isomer of C8H18, the following reaction produces 5113.3 kJ of heat per mole of C8H18(g) consumed, under standard conditions. What is the standard enthalpy of formation of this isomer of C8H18? 25 C,H,„g) + 2 o,g) → sco,g) + 9H,O[g)

> Draw the Lewis dot structure for NaF.

> Which compound matches the IR spectrum? wavelength, micrometers 7 8 2.6 2.8 3 3.5 4 4.5 5.5 6 9 10 11 12 13 14 1516 100 80 60 40 20 3800 3400 3000 2600 2200 2000 1800 1600 1400 1200 1000 800 600 wavenumber, cm1 dipropyl ether 1-hexen-3-ol Which compo

> 12. Select the best reagents for the reaction below. он + enantiomer он 1) Hg(OAc)2, Hz0; 2) NaBH, O H;SO4, H20 O 1) 0,; 2) DMS O 1) Os04; 2) NaHSO,, H20 1) RCO,H; 2) H,0* Testbank, Question 014 Select the best reagents for the reaction below.

> 10. Select the best reagents for the reaction below. 11. Select the best reagents for the reaction below ? -Br A. NaOtBu HBr В. C. H2SO4 NaOH D. E. NaSH \OH + enantiomer Он A. 1. OsO4; 2. NaHSO3, H20 1. Hg(OAc)2, H20; 2. NaBH4 1. RCO3H; 2. H30* H2SO

> Give the geometry, molecular shape about the central atom and hybridization for each central atom of: 1. H2C=C=CH2 2. IF2- 3. PCl4- 4. HONO2

> Write the formula for each ionic compound below, and circle if the compound is Tonic or Molecular. If the compound is ionic, check if is water soluble or water insoluble. Name Formula Circle If lonic, circle Lonic or Molecular soluble or insoluble ca

> Is water a good buffer? Why or why not?

> Determine whether the following molecules are polar or nonpolar: a. NBr3 b. OCS c. XeF4

> Name the following alkenes using systematic names. H3C CH3 H3C H. CH2 CH2 CH2 CH3 CH2 H3C CH3 Br. CH2 CH2 CHa

> Explain why CO2 is nonpolar, but OCS is polar.

> Hydrazine, N2H4, is a base like ammonia. it reacts with an acid such as H2SO4acid according to the equation: What mass of Hydrazine will react with 231.0mL of 0.220 M of sulfuric acid? N2H4(aq) + H2SO4(aq) N2H5*(aq) + SO4 2

> Molecule H Lewis structure Hybridization TeF6 Number of valence electrons Number of σ and π bonds 0: n: Number of bonded atoms on central atom Molecule H Lewis structure Hybridization TeF. Number of valence Number of o and n ele

> Classify the following compounds according to type as ionic or molecular, respectively: NF3, HBr, HgCl2 a. molecular, ionic, molecular b. molecular, molecular, ionic c. molecular, ionic, ionic d. ionic, molecular, molecular

> Consider the following chemical compounds. Classify each as either an IONIC or a MOLECULAR compound. ionic/ molecular NO ionic/ molecular CaSe ionic/ molecular HCl ionic/ molecular LiI ionic/ molecular LiCl ionic/ molecular HF

> Some chemical compounds are listed in the first column of the table below. Each compound is soluble in water. Imagine that a few tenths of a mole of each compound is dissolved in a liter of water. The important chemical species that would be present in t

> How do you find the hybridization for these molecules? CH3CH2OH, CH3COOH, CH3CN, CH3OCH3, IF2(-), SO4(2-)

> Determine the MOLECULAR GEOMETRY of N2O, as well as the hybridization state of the central nitrogen atom.

> Classify each chemical compound as ionic or molecular: 1. MnP ionic or molecular? 2. AlOH3 ionic or molecular? 3. C3S2 ionic or molecular?

> Draw the Lewis dot structure for the following atoms, ions or molecules and predict the shapes. Br Br- S2- Mg Mg2+ N3- 02- K, K+ NaF CaC12 HBr

> Arrange the atom and ions according to radius Largest radius Smallest radius Answer Bank Rb+ Rb Rb-

> Arrange the atom and ions according to radius. Largest radius Smallest radius Answer Bank K K K

> B. Draw the main Lewis structure of NOF Draw nonbonding electrons using the dot notation and bonding electrons as a bond. Place the following elements in order of decreasing atomic radius: chlorine (CI), lead (Pb), alumin Rank the atomic radius from

> Draw the main Lewis structure of NOF. Draw nonbonding electrons using the dot notation and bonding electrons as a bond.

> Which of the following processes are exothermic, and which are endothermic? a. ice cubes melt endothermic exothermic b. snow melts endothermic exothermic c. propane burns in your grill endothermic exothermic

> Provide the IUPAC name for this compound.

> In the reaction, HClO3+N2H4 ⇌ ClO3- + N2H5+ which species are an acid-base pair? HCIO3, N2H4 CIO3-, N2H5+ HCIO3, N2H5+ N2H4, CIO3- N2H4, N2H5+

> Draw the 3D structure for each molecule and state the hybridization of the central atom. ICl2- IF2+ SnI2 CO2 HCN

> Give the products in the following acid-base reactions. Identify the conjugate acid-base pairs. A. N2H5+ + CH3COO- ---> ___ + ___ Conjugate acid-base pairs: N2H5+, ___ CH3COO-, ___ B. S2-+ H2SO3 ---> ___ + ___ Conjugate acid-base pairs: S2-, ___ H2SO3,

> Name the following compound: Spell out the full name of the compound.

> Name the following compound 2H CH3 H3C OINTS: 1 Name the following compound H3C CH3 DINTS: 1 Name the following compound || C-H INTS: 1 Name the following compound NO2 F POINTS: 1 - Name the following compound Br - NH2 .C1 HO.

> The pKa of propanoic acid (propionic acid), CH3CH2COOH, is 4.87. Consider an equilibrium mixture of propanoic acid and its conjugate base with a pH of 4.87. Draw the structure of the form (acid or conjugate base) that predominates after a decrease in [H3

> What is the pH of a solution of 0.054 M propanoic acid? The pKa of propanoic acid is 4.87. A. 5.90 B.4.30 C.3.07 D.7.00 E. 4.87

> If a propanoic acid/propanoate buffer is 0.025 M in propanoic acid and has a pH of 5.23, what is the molar concentration of the propanoate ion? The pKa of propanoic acid is 4.89.

> Write the formula for each ionic compound below, and circle if the compound is Ionic or Molecular. Compound Circle Formula Ionic or Molecular carbonic acid Ionic or Molecular lead(IV) phosphate Ionic or Molecular chromium(III) nítrite Ionic or Molecu

> Write a balanced molecular and net ionic equation that represents the hydrolysis of the following aqueous weak acids or bases. a. KC6H5COOH(aq) b. C6H5NH3CL(aq) c. C2H5NH2(aq) d. C6H5OH(aq)

> i. draw the Fischer projection for each carbohydrate below ii. label Fischer structure as a ketose or aldose iii. draw both stereoisomers for the cyclic hemiacetal iv. label each hemiacetal as α or β anomer a. Glucose Fi

> Identify the conjugate base for each acid. Conjugate base of H2S Conjugate base of H2PO4- Conjugate base of NH4+

> 2. Draw the lewis structure and identify the functional group in each of the compounds below: a. (CH3CO)2CO b. C2H5NH2 c. C3H7NO2 d. (CH3)2CHCONH2 e. C4H9CN

> A popular scuba tank is the "aluminum 80" so named because it can deliver 80 cubic feet of air at "normal" temperature (72 degrees F) and pressure (1.00 atm,14.7 psi) when filled with air at a pressure of 3000 psi. A particular aluminum 80 tank has a mas

> Circle whether the following compounds are ionic or molecular. A. CuCl2 Ionic or Molecular B. SO3 Ionic or Molecular C. MGCO3 Ionic or Molecular

> Select the statements below that are true for this chemical equation: Pb2+ (aq) + Mg(s) → Mg2+ (aq) + Pb(s). There may be more than one correct statement. A. Mg is oxidized. B. Mg2+(aq) is the reducing agent. C. Mg(s) is the reducing agent. D. Pb is o

> Select the statements below that are true when an ice cube is placed in a glass of hot water. qwater =-Qce %3D Fce = qwater The energy gained by the ice cube will be equal to the energy lost by the water. The energy lost by the ice cube will be equal

> Select the statements below that are TRUE. Benzene and its derivatives tend to undergo electrophilic aromatic addition reactions. Benzene and its derivatives tend to undergo electrophilic aromatic substitution reactions. Substitution reactions have energ

> For each formula, write the name for each compound (Don't forget Roman Numerical necessary.), and circle if the compound is Ionic or Molecular. If the compound is ionic, circle if it is water soluble. If Ionic, water soluble? Circle Compound Name Ion

> Pattern baldness, moustaches and beard in human males are examples of a. sex-linked traits b. sex limited traits c. sex influenced traits d. sex determining traits

> Write a Lewis structure for each of the following negative ions, and assign the formal negative charge to the correct atom: (a) H3CO- (b) NH2 (c) CN (d) HCO2 (e) HCO3 (f) HC2 CTICE PROBLEM 1.11 Assign the proper formal charge to the colored atom in

> Determine the overall charge on each complex. hexacyanoferrate(II)

> Write the Lewis dot structure for HC2-

> Identify the conjugate base for each acid. Conjugate base of H3PO4 Conjugate base of HS- Conjugate base of NH4+

> Which of the following is a correct statement? Flammable gasses burn in the presence of oxygen. Inert gases and noble gases are explosive. Flammable gases are not explosive in the correct proportions. Nitrogen and helium are flammable gasses.

> Which of the following is a correct statement of Henry's Law (for real solutions)? PA = P°A "XA PA = POA "aA PA = KA "XA PA = KA "aA

> Do the following for the compound C2H5NO: 1. Complete the two resonance structures below. Add all necessary bonds and lone pairs 2. For both structures (A and B) assign the formal charges for atoms 1-3. 3. Based on the formal charges which is the best Le

> Part B AlH3 Draw the Lewis structure for the molecule. Include all lone pairs of electrons. If resonance structures are needed to describe the Lewis structure, draw all possible resonance structures. Part C N3− Draw the molecule by placing atoms on

> a. Draw the Lewis structure of BF3 and dimethyl ether (CH3OCH3). b. Determine the hybridization of the boron in BF3 and the oxygen in dimethyl ether. c. Sketch the 3D structure of the Lewis acid-base adduct that forms in the reaction between BF3 and di

> For the half-reaction below, which of the following is a correct statement? X* +e > X(s) E° = -2.174 V a) X* is readily reduced b) X* is a good oxidizing agent c) X is a poor reducing agent d) X is a good oxidizing agent e) X is readily oxidized

> Which of the following is a correct statement of Charles Law.

> Which is the most likely first step in the mechanism for this reaction? H20 H3O* + H,O + H2O + H20 + H20

> Which mechanism is most likely in this reaction? SN1 SN2 E1 E2 What is the major product of this reaction sequence? A B C What product is not formed of the reaction shown? A B C HBr Br HO. но. 1. TSCI, pyridine Meo 2. NaOMe C ОН H2SO4 A) B) C)

> The(The order o differential rate law for the balanced chemical reaction: f- kinetics in A aA(aq)+bB(aq)+ cC(a)products is given by The order of kinetics in B The order of) kinetics in C What are the order in each chemical, as well as the overall order o

> 1. Where do water and hydrochloric acid lie on the pH scale in relation to each other? 2. Give an example of a buffer and describe what it is used for. 3. Explain why conjugate pairs must be composed of weak acids and bases. 4. Is water a good buffering

> 1. What is chemical kinetics? 2. What do you understand by the rate of reaction? 3. What are the units of rate of reaction? 4. why certain reactions are very fast? 5. how does catalyst affect rate of reaction?

> Identify the conjugate base for each acid. Conjugate base of H2CO3 Conjugate base of HS- Conjugate base of NH4+

> Identify the conjugate base for each acid. Conjugate base of H2S Conjugate base of HCO3- Conjugate base of NH4+

> Identify the conjugate base for each acid. Conjugate base of H3PO4 Conjugate base of HPO42- Conjugate base of NH4+

> Identify the conjugate base for each acid. conjugate base of H2S: conjugate base of HCO3: conjugate base of NH4+:

> What is the lewis structure of NOF?

> which of these species have resonance or isomers? CH4, CH2Cl2, CH4O, H2O, H3O+, HF, NH3, H2O2, N2, P4

> Molecular Species Lewis structure Molecular geometry around central atom(s) (from the number of electron groups predict the shape) Polar or nonpolar? Structural isomers? CH4 CH2Cl2 CH4O H2O C2H2Br2

> Name the following alkenes using systematic names. 1. 2. 3. H3C, CH2 CH CH H3C CH CH2 by CH CH2 CH H2C CH CH2 CH2 CH CH2 CH2 H3C

> Which of the following statements is ALWAYS true about deposition? None of the other answers are correct AH <0 AG<0 As>0

> Explain why conjugate pairs must be composed of weak acids and bases.

> Do the lewis structure for ethanol and dimethyl ether.

> Consider the following statements and determine which are true and which are false. KrF4 has a tetrahedral structure. Bond angles for IF6+ are 60°. KrF4 is a non-polar molecule. SeF4 is a polar molecule. Silane (SiH4) is a non-polar molecule. NO3- h

> What is the pH of a 1.0 L of a 0.45 M solution of propionic (a.k.a. propanoic) acid? (pKa of propanoic acid is 4.88).

> Mass of flask and foil (g) = 63.4842 Mass of flask, foil, and condensed vapor (g) = 63.6995 Temperature of boiling water bath (C) = 95 degrees C Volume of flask (mL) = 134 Barometric pressure (mmHg) = 763.8 Room temperature (C) = 21.0 degrees C Vap

> Mass of flask and foil(g) - 64.5297g Mass of flask, foil and condensed vapor - 64.9787g Temperature of boiling water bath - 101.2 C Volume of flask (mL) - 153.0 Barometric pressure - 762.4 mmHg Room temp - 23 C Vapor pressure at room temperature - 100 mm

> Given: Mass of flask and foil (g) = 60.1560 Mass of flask, foil, and condensed vapor (g) = 60.4312 Temperature of boiling water bath (C) = 98.7 Volume of flask (mL) = 165 Barometric pressure (mmHg) = 752 Room Temperature (C) = 21.8 Vapor pressure at room

> Given: 1. Uncorrected mass of condensed vapor(g)= 0.2752 2. Corrected density of air(g/L)= 1.668 3. Average volume of flask (L)= 0.165 4. Initial mass of air in flask (g)= 0.2752 5. Final partial pressure of air in flask (mmHg)= 318 6. Final mass of air

> Two reactions between a Grignard reagent and a carbonyl compound are given below. Draw the main organic product for each reaction and indicate if H+ or H- is needed to complete each reaction. Two reactions between a Grignard reagent and a carbonyl co

> a. Draw both chair-flip conformations for trans-1-ethyl-4-isopropylcyclohexane b. Draw both chair-flip conformations for trans-1-ethyl-2-isopropylcyclohexane c. Using the axial energy values listed (the A-Values), calculate the relative energy differen

> Draw a stereoisomer of trans-1-ethyl-4-isopropylcyclohexane. *Use the wedge/hash bond tools to indicate stereochemistry where it exists.

> What happened when the cola and borax solution was each added to the water? Is water a good buffering system? Why or why not, chemically speaking?

> Draw and use chair conformations for conformational analysis. Draw both chair conformations for trans-1-ethyl-4-isopropylcyclohexane and circle the more stable conformer.

> Which of the following processes are exothermic, and which are endothermic? a. sweat evaporates from your skin endothermic exothermic b. clothes dry on a clothesline endothermic exothermic c. gasoline burns in your car endothermic exothermic

> 1. Give the common name for the following compound: Ph−C≡C−Ph 2. Give the common name for the following compound: 2,2-dimethyloct-3-yne 3. Give the common name for the following compound: hexa-1,5-dien-3-yne

> Give the common name for the following compound. N.

> Give the common names for the following compounds: NH2 он click to edit