Which of the following is a chemical change? A. Melting ice
B. Boiling water
C. A burning candle
D. Frost forming inside a freezer

C. A burning candle

Explanation:

Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions.

C: A burning candle

Explanation:

C is a Combustion reaction and this is a chemical change.

The rest are physical changed because they are only changing state.

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)