What is the distribution of earthquakes and volcanoes over the surface of the earth. are they scattered at random or they concentrated in zones

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)

i belive it is water