(a)
Interpretation:
The molecule, methylacetamide is polar or not has to be identified.
Concept Introduction:
The unequal distribution of shared electrons caused by differences in electronegativity between bonded atoms is called bond polarity.
A molecule is non-polar, if the charge distribution is symmetric and a molecule is polar if the charge distribution is asymmetric.
I a molecule us symmetric in shape it is said to be non-polar. If a molecule is not regular, it is said to be polar.
(b)
Interpretation:
The expected position of positive and negative charges in methylacetamide has to be predicted and also identify whether the electrostatic potential surface confirm the prediction.
Concept Introduction:
Electrostatic potential surface or maps are known as molecular electrical potential surfaces, that illustrates the charge distributions of molecules three dimensionally.
Trending nowThis is a popular solution!
Chapter 8 Solutions
Chemistry & Chemical Reactivity
- Acrylamide, H2C=CHCONH2, is a known neurotoxin and possible carcinogen. It was a shock to all consumers of potato chips and french fries a few years ago when it was found to occur in those products. (a) Sketch the molecular structure of acrylamide and identify all bond angles. (b) Indicate which carbon-carbon bond is the stronger of the two. (c) Is the molecule polar or nonpolar? (d) The amount of acrylamide found in potato chips is 1.7 mg/kg. If a serving of potato chips is 28 g, how many moles of acrylamide are you consuming?arrow_forwardA resident expert on electronegativity comes up to visit with you. He makes two claims (seen below) about electronegativity with relation to covalent bonding. Is the expert correct or can you refute him with your knowledge of electronegativity? (a) If a diatomic molecule is made up of atoms X and Y, which have different electronegativities, the molecule must be polar. (b) The farther two atoms are apart in a bond, the larger the dipole moment will be.arrow_forwardUrea, (NH2)2CO, is used in plastics and fertilizers. It is also the primary nitrogencontaining substance excreted by humans.(a) Which bonds in the molecule are polar, and which are nonpolar?(b) Which is the most polar bond in the molecule? Which atom is the negative end of the bond dipole?arrow_forward
- In which of the following compounds does hydrogen bear a partial negative charge: (a) CH4, (b) NH3, (c) H2O, (d) SiH4 or (e) H2S?arrow_forwardii. Answer true or false. (a) A covalent bond is formed between two atoms whose difference in electronegativity is less than 1.9. (b) If the difference in electronegativity between two atoms is zero (they have identical electronegativities), then the two atoms will not form a covalent bond. (c) A covalent bond formed by sharing two electrons is called a double bond. (d) In the hydrogen molecule (H2), the shared pair of electrons completes the valence shell of each hydrogen. (e) In the molecule CH4, each hydrogen has an electron configuration like that of helium, and carbon has an electron configuration like that of neon. (f) In a polar covalent bond, the more electronegative atom has a partial negative charge (8-) and the less electronegative atom has a partial positive charge (&+). (g) These bonds are arranged in order of increasing polarity C-Harrow_forwardNa+ forms an “ionic bond” (i.e. an electrostatic attraction) with the OCN− ion. (a) Draw the full Lewis structure of the ionic compound. Be sure to show how you have derived this. (b) Which atom in the OCN− anion is the sodium cation most likely to attract? Explain.arrow_forwardConsider the collection of nonmetallic elements O, P, Te,I, and B. (a) Which two would form the most polar singlebond? (b) Which two would form the longest single bond?(c) Which two would be likely to form a compound of formulaXY2? (d) Which combinations of elements would likelyyield a compound of empirical formula X2Y3?arrow_forwardH. H. H. H. H. The diagram above shows two resonance structures for a molecule of C6H6. The phenomenon shown in the diagram best supports which of the following claims about the bonding in C6H6 ? (A) In the C6H6 molecule, all the bonds between the carbon atoms have the same length. (B) Because of variable bonding between its carbon atoms, C6H6 is a good conductor of electricity. (C) The bonds between carbon atoms in C6H6 are unstable, and the compound decomposes quickly. The C6H6 molecule contains three single bonds between carbon atoms and three double bonds between (D) carbon atoms. IIUarrow_forwardTwo substances with empirical formula HNO are hyponi-trous acid ( μ=62.04 g /mol) and nitroxyl (μ=31.02 g/mol).(a) What is the molecular formula of each species?(b) For each species, draw the Lewis structure having the lowestformal charges. (Hint:Hyponitrous acid has an N=N bond.)(c) Predict the shape around the N atoms of each species.(d) When hyponitrous acid loses two protons, it forms the hy-ponitrite ion. Draw cisand transforms of this ion.arrow_forwardOxalic acid, H2C2O4, a poisonous colorless solid, is found in some vegetables such as spinach and rhubarb. It is present in concentrations well below the toxic limit, so you can't use this as a reason to refuse a helping of spinach. The order of atoms in a molecule of oxalic acid is HO2CCO2H. (a) How many unshared pairs of electrons are on each of the carbon atoms? (b) How many unshared pairs of electrons are on each of the oxygen atoms?arrow_forwardII. The nitrogen atom has a lone pair of electrons. (A) I only (B) II only (C) Both I and II (D) Neither I nor II . In which molecule are there two distinct sets of sulfur- fluorine bond lengths? (A) SF₂ (B) SOF₂ (C) SF4 (D) SF6 2. Which species contains three sigma bonds and one pi bond? (A) PF3 (B) NH (C) C₂H₂ (D) CO32- 3. How many stereoisomers of octahedral CoCl₂(NH3)2(CN)2 are possible?arrow_forwardIn each case, tell whether the bond is ionic, polar cova- lent, or nonpolar covalent. (a) Br, (e) SiH, (d) SrF, (c) HCl (g) N, (b) BrCl 2 (f) CO (h) CsCl 4.arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
- Chemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning
- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning