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Chemistry, 09.03.2021 20:00 capo9972

(D) The creation of a new, solid substance from two liquid substances indicates that a reaction has taken place and altered the original substances. Is the author of the article suggesting that there are exceptions to the general indicators of chemical or physical changes? Which selection from the article BEST supports your answer? (A) Yes; Physical changes in matter are reversible: An ice cube can melt into liquid water, and then the liquid water can be frozen back into an ice cube. Chemical changes, on the other hand, are not reversible: A log burned in a fire tums to ashes, but the ashes cannot be changed back into a log. (B) No: Sometimes it is difficult to tell if a chemical reaction has taken place. To help determine whether there has been a reaction. chemists consider the basic indicators that a reaction has occurred, such as a change in temperature, a change in color, the development of an odor, the formation of a precipitate, or the formation of a gas. (C) Yes: In the case of table salt, it dissociates into sodium ions and chloride ions in the water, which would seem to be a chemical change. However, scientists do not consider this to be a chemical change because the solid table salt remains after the water is evaporated. The table salt dissociated, but the atoms recombine into the same arrangement once the water is removed. (D) No: Remember that a physical change is a change in properties such as texture, shape or state, while a chemical change represents the formation of a new substance after atoms are rearranged in a chemical reaction. Read the list of words and phrases from the article.​

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(D) The creation of a new, solid substance from two liquid substances indicates that a reaction has...
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