Cyclohexyne (A) is more stable than cyclohexane (B) because all atoms can adopt their ideal geometries. True False

(a) Methane (CH4) and the perchlorate ion (ClO4- ) are bothdescribed as tetrahedral. What does this indicate about theirbond angles? (b) The NH3 molecule is trigonal pyramidal, while BF3 is trigonal planar. Which of these molecules is flat?

Propylene, C3H6, is a gas that is used to form the importantpolymer called polypropylene. Its Lewis structure is given. (a) What is the total number of valence electrons in the propylenemolecule? (b) How many valence electrons are usedto make σ bonds in the molecule? (c) How many valenceelectrons are used to make π bonds in the molecule? (d) Howmany valence electrons remain in nonbonding pairs in themolecule? (e) What is the hybridization at each carbon atomin the molecule?

Propylene, C3H6, is a gas that is used to form the importantpolymer called polypropylene. Its Lewis structure is   (a) What is the total number of valence electrons in the propylenemolecule? (b) How many valence electrons are usedto make s bonds in the molecule? (c) How many valenceelectrons are used to make p bonds in the molecule? (d) Howmany valence electrons remain in nonbonding pairs in themolecule? (e) What is the hybridization at each carbon atomin the molecule?

How many  "central" atoms are part of methanol (CH3OH)? What are the moleculare geometries of each central atom?

Determine the electron and molecular geometries of each molecule. For molecules with two central atoms, indicate the geometry about each central atom.(a) N2(b) N2H2 (skeletal structure HNNH)(c) N2H4 (skeletal structure H2NNH2)

which of these molecules have a N with linear geometry?

9) HCCCO₂H, is an organic hydrocarbon. a) Draw a geometrically accurate structure so that the formal charge of each atom is zero identifying the bond angles (Draw it BIG!). b) Identify the hybridization about each atom (not H) forming a bond c) How many o or π bonds are there in this molecule d) The combustion of the hydrocarbon produces carbon dioxide and water in the gaseous state. Use average bond enthalpies to determine enthalpy of reaction

1.) Use the VSEPR model to determine the three-dimensional shapes ofcarbon tetraiodide, CI4, and phosphine, PH3.  Circle the correct answer! Choose only 1. CI4:  Linear trigonal planar      bent tetrahedral trigonal pyramidal trigonal bipyramidal seesaw T-shaped Octahedral square pyramidal square planar Circle the correct answer! Choose only 1. PH3:  Linear trigonal planar      bent tetrahedral trigonal pyramidal trigonal bipyramidal seesaw T-shaped Octahedral square pyramidal square planar   2.) Identify the polarity of carbon dioxide (CO2) and water (H2O) based upon its geometry and the dipole moments of the individual bonds. Circle the correct answer! Choose only 1. carbon dioxide: Polar nonpolar         Circle the correct answer! Choose only 1.water: polar nonpolar

For each compound in the table below, decide whether there would be any hydrogen-bonding force between molecules of the compound, or between molecules of the compound and molecules of water. name acetic acid dimethyl ether compound hypobromous acid formula or Lewis structure H :0: H-C-C-O-H H H H-C-0-C H H H T HBrO | H Between molecules of the compound? yes O O no O yes no yes hydrogen-bonding force no Between molecules of the compound and molecules of water? O O yes no yes no yes no X