Chemistry, 28.08.2019 13:00 mya1318

In caves, dripping groundwater containing calcium bicarbonate can form stalactites and stalagmites. when the water is exposed to air, some of the calcium biscarbonte turns into calcium carbonate, which gets deposited on the ground. what makes this process a chemical change?
a. a new substance is formed in this process, which is an important clue to chemical change
b. a change in state is observed in this process, which is an important clue to chemical change.
c. this process involves separation of dissolved substances, which is an important clue to chemical change
d. this process involves substances together, which is an important clue to chemical change.
e. this process involves breaking and reshaping of substances, which is an important clue to chemical change.

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