Chemical Bonding Questions and Answers

Label each of the following bonds as ionic 1 polar covalent PC or nonpolar covalent NC N S C H C O Submit Question I

Nitrogen oxides are pollutants and common by products of power plants and automobiles NO can react with the NO in smog forming a bond between the N atoms N Select N 0 Draw the structure of the resulting compound including formal charges Draw product Rings More

Online tea FULL MA Sigma Bonding Assignme Is orbital Review Topics References Use the References to access important values if needed for this question Click here A a bond arises from the straight on overlap of two atomic orbitals The electron density lies Jalong the axis of the two bonded nuclei tp hybrid orbital What is the approximate H Si H bond angle Example Sigma Bonding in methane CH4 Click here What atomic or hybrid orbitals make up the sigma bond between Si and H in silane SiH4 orbital on Si orbital on H COnline tea OAM

2 points covalent bond is characterized by two properties These are the bond length and the bond energy the energy of the separated atoms and the energy of the new bo the bond length and the polarity of the covalent bond the energy of the bond and the location of the electron pair in th

16 2 points The following resonance structures can be drawn for the azide ion N3 Identify the best resonance structure N N N N 1 a a d C N N N b N N N N N N c

How many bonds and lone pairs are on chlorine a 2 0 b 1 3 c 3 1

How many grams of iron are needed to completely consume 15 1 L of oxygen gas according to the following reaction at 25 C and 1 atm iron s oxygen g iron II oxide s grams iron

Rank each set of bonds in order from most polar 1 to least polar 4 Submit Question H CL H F H O H N K

2 points Based on the best Lewis structure from formal charge considerations how many resonance structures if any can be drawn for the CIO4 ion 4 3 2 1 no resonance

Review Topics References One of the first drugs to be approved for use in treatment of acquired immune deficiency syndrome AIDS was azidothymidine AZT H 010 G H H H CA 1 HHC C H IT N H N N CH a How many carbon atoms are sp hybridized b How many carbon atoms are sp hybridized c Which atom is sp hybridized e d How many o bonds are in the molecule Show Hint bonds are in the molecule Previous N

15 2 points Which of these is the proper Lewis structure of carbonic acid H CO3 H C 0 H a 00 a b 0 H C B H b O H O C 0 H c H C H d

The number of covalent bonds which oxygen atom normally forms in order to complete its valence shell and obey the octet rule is 0000 8643

Classify each molecule as polar or nonpolar Br 2 Polar 5 2 4 Br Answer Bank C Br F Nonpola

4 a 4 points Select the formulas in which the central atom does not obey the octet rule select all that apply wrong choices will be penalized CH4 BF3 BeCl2 NH3 H SO4 PC15 LINO

Sign In Online tea 16 FULL MA Assignme p orbital atom 1 Review Topics References Use the References to access important values if needed for this question Click here orbital on C orbital on C How many o bonds does C have in CHCCH3 How many bonds does C have A bond arises from sideways overlap of two parallel p orbitals The electron density lies above and below a plane containing the 2 nuclei that is perpendicular to the orbitals 8 8 p orbital atom 2 Click here bond What atomic or hybrid orbitals make up the bond between C and C in propyne CHCCH3 C Online tea Al

Overall Balance To review an atom is made up of 3 types of particles which are Notice that the protons and electrons have opposite charges I what does this mean about the overall balance of an atom charge charge The smallest piece of an element which still has the properties of that element is called an Central core is called a and has a charg It is surrounded by an Cloud which has a charge These 2 parts balance each other out so that the atom is electrically neutral or has NO electri charge The in an atom is called the atomic number The elements in the periodic table are arranged according to increasing atomic number It is the number of that determines the atomic number H element hydrogen 1 The number of protons in an element is constant H 1 for 1 proton 2 He helium for 2 protons and so on Argon Ar is number 18 This procedure NEVER changes The protons are the identify the element The number of protons is equal to the number of electrons s They that the element is electrically stable for hal

What is the check in determining the bonding structure a Comparing dots on final structure to number of valence electrons b That each atom has a full valence shell c That the atoms have at least one connection d That hydrogen has one bond

How many electrons do each atom have around it after it bonds except hydrogen a 2 b 6 C 8 d depends

volatile and 5 being the most volatile H H C Structure 1 3 1 2 3 4 H I I CIH C HT Structure 4 H C H C HI H H I I H Structure 2 H H H C CC H H I I H H C CO H I I H H H H H C H Structure 5 HO HT H Structure 1 Structure 3 Structure 2 CH N H Structure F H C Structure 3 H I I H

Choose the correct Lewis structure for HNO A O B O C O D O E O H NH NO H N FO O H N O H N O O Select one answer 6 points

What is force holds together ions in an ionic compound a Magnetic b covalent c electrostatic d mechanic a Ob

What is the name of the interaction in the previous question a Covalent Bond b lonic Bond c Metallic Bond d Nuclear Bond

Practice Exam Questions 1 Write and balance the chemical combustion of methanol gas CH3OH into carbon dioxide gas and water vapor Include all physical states 2 Draw the 3D Lewis structures for all molecules in the above reaction 3 Calculate the enthalpy of this reaction AHrxn 4 There are two central atoms in methanol For each central atom determine the electronic geometry the molecular shape and the measure of the bond angles 5 Would you expect methanol to be a polar molecule Explain your reasoning 6 Calculate the oxidation state for carbon in the reactants and products If a redox reaction has occurred state which process the carbon has undergone in this reaction 7 What is the hybridization around the central atom in water 8 Use partial atomic orbital diagrams to describe how the hybridizing of the atomic orbitals of the central atom leads to hybrid orbitals on the central atom in water and how it leads to the shape around that central atom

What is the hybridization around the central atom in CO2

Choose the correct Lewis structure for PI A O B O C O D O E O 1 7 X A 1 Select one ans 5 points

Indicate the bond polarity show the partial positive and partial negative ends in the following bonds The tail of the arrow indicates the partial positive end of the bond dipole a Te H Te H Te H No bond dipole b Br Se e Br Se Br Se O No bond dipole c N C ON C ON C O No bond dipole d P Br OP Br OP Br No bond dipole 0 Cl 00 O CI No bond dipole

Using the MO diagram below for the theoretical molecule He2 calculate the bond order Then briefly discuss whether this answer makes sense Energy 1s 01s 01s 1s

What are ASuniv ASsys and ASsurr when water is frozen at 10 C H O 1 H O s O O

What is the electron geometry of the compound below F I F EC F F

The structure of acetominophen is shown below but the non bonding electrons are missing 1 H O sp sn H C C C H 3 C H H C C H II IR OH Fill in the non bonding electrons and then use the complete Lewis structure to answer the following questions The molecular shape at 1 is The C C H bond angle at 2 is approximately The hybridization at 3 is v The molecular shape at 4 is The hybridization at 5 is Fill in the blanks by one option from eac ab Part 1 2 points ab Part 2 2 points ab Part 3 2 points aby Part 4 2 points aby Part 5 2 points 10 points W

All of the following species contain N O bond s NO NO NO Draw the Lewis structure s for each then answer the following questions Which has the strongest N O bond Which has the longest N O bond NO

Decide what kind of crystalline solid each element or compound in the table forms and what kind of force holds the solid together Then rank the solids in order of decreasing melting point That is select 1 next to the solid with the highest melting point 2 next to the solid with the next highest melting point and so on You may need to use the scrollbar to see all the choices element or compound Zn Ne type of solid formed 7 force holding the solid melting point of together solid 7 V

The structures of two molecules are shown below Note non bonding electrons are not shown Fill in the blanks by sel one option from each m ab Part 1 3 points ab Part 2 3 points ab Part 3 3 points ab Part 4 3 points AO F bond is A OF molecule is A C Cl bond is Fill in the nonbonding electrons to complete the Lewis structures then for each molecule i state whether the indicated bond is polar or nonpolar ii determine whether the molecule is overall polar or nonpolar F A CH Cl molecule is F 0 F V H I Cl C Cl I H 12 points

Which is true of the following Lewis structure More than one answer may be correct OISIO 0 s0 2 There are too few valence electrons in total to produce the expected charge O There are too many valence electrons in total to produce the expected charge One or more atoms has too many valence electrons and is not an atom that s expected to have an expanded octet One or more atoms has too few valence electrons and is not an atom that s expected to have an incomplete octet Atoms in the structure do not have the lowest formal charges of possible Lewis structures

a Predict the molecular structure and bond angles for BeH Approximate bond angles are sufficient Molecular Structure Bond Angles b Predict the molecular structure and bond angles for OC12 Approximate bond angles are sufficient Molecular Structure Bond Angles O O

Which type of bonding forms due to electrical attractions between oppositely charged elements O covalent O ionic O metallic subshell Which term describes a negative ion anion O cation Oionic radius Ovalence electron Which type of structure do most ionic compounds form O molecule crystal lattice

t is the hybridization of the C in this aci CH3 C 0 H

is the hybridization of the C in this ketor O CH3 C CH3

Use bond energies values of electron affinities and the ionization energy of hydrogen 1312 kJ mol to estimate AH for the following reacti Bond Energies Electron Affinities H F 565 kJ mol F g 328 kJ mol H Cl 427 kJ mol Cl g 349 kJ mol H I 295 kJ mol I g 295 kJ mol 0 H 467 kJ mol OH g 180 kJ mol a b AH AH HF g H g F g kJ HI g H g I g kJ

Place the species below in order of the shortest to the longest nitrogen oxygen bond H NOH N O NO NO NO3 H NOH exists as H N OH increasing of the nitrogen oxygen bond length Drag and drop your selection from the following list to complete the answer

a Compare and contrast strong vs weak acids in terms of percent dissociation b Compare and contract strong vs weak acids in terms of conductivity c Does the same hold true for strong vs weak bases Explain your answer

Consider the ion with a charge of negative 2 and consisting of a sulfur atom and four oxygen atoms How many total valence electrons does this ion have Write your answers as a number 0 1 2 3 4 etc How many resonance structures if any can be drawn for this ion Write your answers as a number 0 1 2 3 4 etc

12 0g of iron is reacted with 24 0L of steam according to the following reaction 2Fe 3H O Fe O3 3H What mass of rust iron III oxide results

04 Which compound is produced by a neutralization a H O b HNO3 aq Which of the C 05 C Ca OH s d H3PO4 aq

Carbon and sulfur form compounds with each other with the formulas CS and C3S Choose a Lewis structure for each compound that has a formal charge of zero for all atoms in the str a CS S C S S S C S b C3S O S CC C S CES CSC 0

Calculate the AG in kJ of the following reaction NO2 g SO g NO g SO3 g Given the following data AGO NO 52 27 kJ mol AGO SO 82 56 kJ mol AGO NO 302 77 kJ mol AGO SO3 373 59 kJ mol Do not put a unit in your answer Report your answer with 1 place past the decimal po Do not use scientific notation

oose the name of each of the following molecular structu Molecular structure Name

a Predict the molecular structure and bond angles for ClO Approximate bond angles are sufficient Molecular Structure Bond Angles b Predict the molecular structure and bond angles for O3 Approximate bond angles are sufficient Molecular Structure Bond Angles V

ndicate the bond polarity show the partial positive and partial negative ends in the following bond The tail of the arrow indicates the partial positive end of the bond dipole a C O OC O C O O No bond dipole b F Se OF Se OF Se O No bond dipole c N C ON C ON C O No bond dipole d Br Te O Br Te O Br Te O No bond dipole e As F As F As F No bond dipole Sha

1 Why do atoms form compounds 2 What part of the atom participates in a chemical bond 3 What is the number of electrons an atom needs to have in Chapter 6 Test Rev 4 When an atom gains or loses valence electrons it become 5 An ionic bond forms between the attraction of a 6 Fill in the chart for each ion lon Sodium Oxygen Gain or lose number of electrons Charge of lon Ca Am