What gas makes up approximately 74 percent of the Sun's mass?

More Questions:

What two pieces are moved in chess to execute a castling maneuver?

What type of sport is Birling?

What Broadway musical was based on the comic strip Little Orphan Annie?

What surname for John in "The Importance of Being Earnest" did Oscar Wilde take from the seaside town he vacationed at?

Puccini's "Turandot" is set in which country?

Which composer was nickname the "Red Priest"?

In what city would you find Tivoli Gardens?

In what country would you find the mouths of the Colorado river?

What is the capital of Austria?

Barn, Burrowing, and Great Horned are species of what bird?

What is the atomic number of the element uranium?

What chemical element has been added to table salt since 1924, to help prevent goiter?

Which space shuttle is named for the ship on which Robert Scott first sailed to Antarctica?

Who has been played in a movie by both Kirk Douglas and Tim Roth?

In mathematics, which prefix refers to 10 to the power of 21?