Look at the model of matter below. Choose the best answer that addresses the numbers asked for. * 2, 4
4, 2
1, 3
1, 2
These aren't atoms 'cuz you can't see atoms.

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 dissolution of polymer can be thermodynamically described in 2 steps.