Pure sodium metal explodes when it makes contact with water. In its natural state, chlorine is a deadly, poisonous gas. When these two chemicals combine, they form a harmless, white powder known as sodium chloride or table salt. Which of the following statements does this information support? A. The properties of substances change during chemical reactions but then later go back to their original condition. B. Heat must be added in order to change the chemical properties of substances. C. When substances are chemically combined, the properties of the new substances that are formed are often different from the properties of the original substances. D. When substances are chemically combined, the properties of the new substances that are formed are the same as the properties of the original substances.
I think it's D but I'm not sure
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