Which one of the following molecules is the most polarizable? F2 H2 Br2 I2 Cl2

Which of the following statements about a p* antibonding molecular orbital is true?   A pi* antibonding molecular orbital is formed when two p orbitals of similar phase overlap. A pi* antibonding molecular orbital is formed when two p orbitals of opposite phase overlap. A pi* antibonding molecular orbital is a higher-energy molecular orbital than a pi bonding molecular orbital. Both the statements “a pi* antibonding molecular orbital is formed when two p orbitals of opposite phase overlap” and “a pi* antibonding molecular orbital is a higher-energy molecular orbital than a pi bonding molecular orbital” are true.

6. Identify the principal intermolecular forces in the following compounds: HF, C,H3, NCI3, Br2, HI

which of the following molecules are polar? ch3cl HCN Both  Neither

Which molecule is expected to have the largest dispersion force? a)C3H8 b)F2 c)N2H4 d)C8H16

Are the following statements true or false?    End-to-end overlap results in a pi bond.    A sigma bond allows rotation about its bond axis.    A double bond consists of two electrons.    A triple bond consists of one sigma bond and two pi bonds.    Bonds formed from atomic s orbitals can be either sigma or pi bonds.    Two pi bonds comprise a double bond.

Which of the molecules, if any, have no polar bonds and a net dipole? BF3 CH,F, H,0 None of the molecules have no polar bonds and a net dipole. CH4 Co, CO2

Which member of each of the following pairs of substances would you expect to have a higher boiling point?   (a) O2 and Cl2, (b) SO2 and CO2, (c) HF and HI

c4

Identify the compound with the smallest dipole moment in the gas phase. OHF OCHBr3 0 H2 O BrF O Nal