Answers To 2021-2022 Honors Chem328 Polarity, IMF And Physical Properties Review HW

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Here are the answers to 2021-2022 Honors Chem328 Polarity, IMF and Physical Properties Review HW

1)

2)

N₁H₃: 8ve^-, 3 single bonds, N is central atom with 1 lone pair (LP), Pyramidal (107.0°), sp³
B₁F₃: 24ve^-, 3 single bonds, B is central atom with no LP, Trigonal planar, 120°, sp²
N₂: 10ve^-, 1 triple bond, no central atom, Linear (180°), NA
C₁O₂: 16ve^-, 2 double bond, C is central atom with 0 LP, Linear (180°), sp

CCl₄, ΔEN =0.5, 4 non-polar bonds, Tetrahedral (sym), NA, non-polar molecule, LDF
BeCl₂, ΔEN =1.5, 2 polar bonds, Linear (sym), Yes, non-polar molecule, LDF
CS₂, ΔEN=0.0, 2 non-polar bonds, Linear (sym), non-polar molecule, LDF
NF₃, ΔEN=1.0, 3 polar bonds, Pyramidal (not sym), polar molecule, dipole-dipole

4) sp₃ hybridized

5)

6)+-->, Arrow over the more electronegative atom (or whatever way you memorize the symbol).

7) Ionic ΔEN> or = 1.7
polar bond is 1.7<ΔEN> or = 0.8
non-polar ΔEN<0.8

8) Assume polar prove non-polar

9)

10) Dipole-dipole (D - D) interaction

11) Yes

12) No, polar or non-polar is for covalent (sharing) bonds

13) False

14) NH₃, has more Hydrogen bond (actually it is H₂O₁)

15)

16) H₂O₁ is a polar molecule and oil is a hydrocarbon (C_xH_y) a non-polar molecule. So H₂O₁ exerts coloumbic force (CF) while oil does not. So H₂O₁ molecules are interacting with other H₂O₁ molecule so they will "push oil molecules" around so they will be together.