Which of the following bonds are polar? C-O, Cl-CI, O=0, N-H, C-H. (Electronegativites: C = 2.5, H = 2.1, Cl = 3.0, O = 3.5, N = 3.0). In the selected bonds indicate which direction the electron density is greatest.

Rank the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest boiling point, choose 2 next to the substance with the next highest boiling point, and so on. substance A B C chemical symbol, chemical formula or Lewis structure :0: || H-C-H Co H₂ H-C-H || H-C-H boiling point (Choose one) (Choose one) (Choose one) ✓ (Choose one) X Ś V 0 E

Draw the correc (best) Lewis structure (LS) for the ionic compound K2SeO3 (on looose leaf paper--NOT TO BE SUBMITTED) and then answer the following questions.(NOTE: Use the cardinal numbers 0, 1, 2, 3, and so on for any quantity required)a)   What charge does the K ion have in this compound? (give size & sign of charge: e.g., 1+, 2-, etc.)   b)   What charge does the SeO3 ion have in this compound? (give size & sign of charge: e.g., 1+, 2-, etc.)   c)   How many lines, if any, attach each K ion to the SeO3 ion?      d)   How many valence electrons does the SeO3 ion (alone) have?   e)   How many single bonds does the LS of the SeO3 ion have?   f)   What is the number of lone electron pairs in the LS of the SeO3 ion?

Rank the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest boiling point, choose 2 next to the substance with the next highest boiling point, and so on.