Which gas, discovered in 1774, got its name from the Greek words for "acid-forming"?

A competitive speed skater since age 4, which American won her first Olympic gold medal in 1988? A complaint by Newt Gingrich about outside income led to which House Speaker's 1989 resignation? In a medical chart, a complaint of SOB means shortness of what? Which often-sung song was originally titled "Good Morning to All" in 1893? Which component of the blood is abbreviated Hb? Which Baroque composer's initials were J.S.B.? Which composer, who died in 1827, reportedly said on his deathbed, "I shall hear in heaven"? A compromise allowed Maine's admission to the Union in 1820 as a free state and which state in 1821 as a slave state?