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Which of the peaks in the mass spectrum represents the molecular ion, M+ (also known as the parent peak?

Which of the following wavenumber corresponds to the fingerprint region on an IR spectrum?

Which of the following compounds gives an infrared spectrum with peaks at 3300 cm−1 (sharp peak) and 2150 cm−1 (sharp peak)?

Adept Kung wanted to abolish the ritual of sacrificing a sheep. Confucius said 

In the 20th Century, who founded the Republic of China, and wrote a collection of sayings called the little red book?

Daoists say that their founder was 

Sometimes, even leaders of small principalities would receive a title that is translated as “king”, that title being 

Zhang Daoling founded 

Zao-jun, the god of the hearth, reports to 

What word literally means “sky”, but is often translated as “heaven”, because it refers to a force more powerful than Shang Di?