Unit 5 Quiz 3

Which is most likely an example of an angular molecule? NH3 H2O SiCl4 H2CO

H2O

Which type of hybridization leads to a bent molecular geometry and a tetrahedral electron domain geometry? sp s2p s2p2 sp3

sp3

Two molecules have the same molecular geometry but different electron domain geometries. Which combination of atoms and lone pairs around the central atom could describe these molecules? 2 atoms and 2 lone pairs; 3 atoms and 0 lone pairs 1 atom and 3 lone pairs; 2 atoms and 1 lone pair 3 atoms and 1 lone pair; 3 atoms and 0 lone pairs 2 atoms and 2 lone pairs; 2 atoms and 1 lone pair

2 atoms and 2 lone pairs; 2 atoms and 1 lone pair

Which best compares a molecule that has a trigonal planar shape with one that has a trigonal pyramidal shape? They both contain three lone pairs of electrons around the central atom. They both contain three atoms around the central atom. The central atom of the trigonal planar molecule has two lone pairs around it, but the central atom of the trigonal pyramidal molecule has only one. The central atom of the trigonal planar molecule has two atoms around it, but the central atom of the trigonal pyramidal molecule has only one.

They both contain three atoms around the central atom.

A molecule has two atoms that are bonded to the central atom and one lone pair of electrons around this central atom. What is the shape of the molecule? bent linear trigonal planar trigonal pyramidal

bent

What is the molecular shape of HCN? bent linear angular trigonal pyramidal

linear

By examining electron domain geometry, one can determine that the ammonia molecule (NH3) has one sp2 orbital. two sp2 orbitals. three sp3 orbitals. four sp3 orbitals.

four sp3 orbitals.

The hybrid orbitals of a molecule are shown in the figure. mc014-1.jpg These hybrid orbitals were most likely formed by mixing one s orbital and one p orbital. one s orbital and two p orbitals. one s orbital and three p orbitals. two s orbitals and two p orbitals.

one s orbital and one p orbital.

The shape of a molecule is trigonal planar. How many electron domains around the central atom does this molecule most likely have? zero two three four

three

The shape of a molecule is tetrahedral. How many lone pairs are most likely on the central atom? zero two three four

zero