What is the overall reaction order?

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)

the atomic mass is the bottom number on the element.

-steel jelly

its first and third is your answer i did the qustion the fourth isnt right