What is the cloud of gases that forms around the nucleus of a comet called?
a. coma
b. gas tail
c. dust tail
d. giant red spot

What is the force of attraction between the particles in a salt crystal

Match the acid base pairs by arranging the acid name with the conjugate base formula. hydrogen carbonate hydrogen phosphate carbonic acid read water sulfuric acid phosphoric acid a. co32- b. hso4- c. hco3- d. po43- e. h2po4- f. oh-

About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?