Why are comets unlikely to be able to support life? a. a comet's environment is not stable. b. a comet does not have an atmosphere. c. a comet does not have a reliable energy source. d. all of these

An aqueous solution of hydroiodic acid is standardized by titration with a 0.186 m solution of calcium hydroxide. if 26.5 ml of base are required to neutralize 20.3 ml of the acid, what is the molarity of the hydroiodic acid solution? m hydroiodic acid

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

Which traits do human embryos have that link them to a common ancestor with fish and reptiles? a. scales and tail b. gill slits and scales c. tail and gill slits d. hair and tail