If every atom of an oxygen has 8 protons in its nucleus what is the atomic number of oxygen

What type of reaction is zn + cucl2 → cu + zncl2?

Which type of precipitation would most likely form when the surface air temperature is slightly below freezing and the air temperature increases as you move upward away from the ground?

How many absorptions would you expect to observe in the 13c nmr spectra of the following molecules? a) 3-chloropentane b) cis-4-methyl-2-pentene