Which molecule has polar bonding and is nonpolar? a H2O
b BF3
c NH3
d NCl3
e CH2Cl2

much appreciated I have around an hour left to finish my test​

There is one girl i like and i don't know how to tell her that, i have a feeling she knows but if she doesn't i don't want to make a fool out of myself how is one way to boost my confidence on asking her out

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?

In a copper wire, a temperature increase is the result of which of the following