What is the chemical name for a dentist's "laughing gas"?

More Questions:

In tarot cards, what is the equivalent of the joker?

Sinologists study which country?

What traditional Russian instrument looks like a triangular guitar?

What decade was the first Indianapolis 500 race held in?

Playwright Thomas Lanier "Tennessee" Williams was born in what US state?

Who was the Greek goddess of marriage and women as well as the queen of heaven?

Approximately, how many feet above the sea level is Machi Picchu located at?

In what part of the body would you find sebum?

What children's TV character lived in the Treasure House?

What code name does Linda Fiorentino receive at the end of the movie "Men in Black"?

What is Ben Stiller's character's last name in the movie "Meet the Parents"?

What kind of animal is the title character in the 1946 movie "The Yearling"?

What was the name of the nightclub that Peter Gunn frequented?

In 1990, in a postcommunist transition, union leader Lech Walesa became President of what country?

Who composed "Invitation to the Dance" in 1819?