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

More Questions:

In 2005, what product reintroduced its catchphrase "I can't believe I ate the whole thing"?

In 1917 Lucy Slowe was the first US what?

In 1975, what re-opened after an 8 year closure?

In 1982, who began selling spaghetti sauce, turning over all profits to charity?

What literary work inspired Green Day's "Who Wrote Holden Caufield" song?

What type of animal is Napoleon, in George Orwell’s novel “Animal Farm?”

What was The Police's biggest selling single?

What famed Motown songwriting trio had their first Top Ten hit with "Heat Wave"?

In the movie "Top Gun', what is the name of Maverick's co-pilot?

In the TV show "Bonanza', what was Hoss Cartwright's first name?

What year was Elvis born in?

Who composed the title music to TV's "Inspector Morse"?

What name is shared by an 1849 painting by Asher Durand, and a sculpture situated in Bailick Park in Midleton, Ireland?

Who had a hit in 1988 with the song "I Get Weak"?

Which band released the tracks "Monkey Wrench" and "Learn to Fly"?