Which gas is most abundant in earth's atmosphere? question 1 options: a. nitrogen b. methane c. carbon dioxide d. oxygen plz anwser will 5 star and more

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)