Misc: What sort of stone floats on water?

Questions

Captain What two word term is considered the lowest possible temperature?

Carbonated soda water was invented in 1767, 1768 or 1769?

Carlos This planet has an atmosphere that is 98 percent Helium?

Carmenta is the roman goddess of ______?

Carole king sings 'you just call out my name, and you know wherever i am i'll come running ..'. what is the song title?