Question

Which of the following is a chemical change? A. a solution of salt water being diluted as water is added to it B. soil drying as water evaporates C. a rock eroding as the wind removes particles from it D. silver tarnishing as the silver metal reacts with sulfur

Answer 1

A chemical change occurs when the identity of a substance is changed. Silver tarnishing is a chemical change because silver and sulfur react to form a new substance, silver sulfide. In the other examples, the substances have not changed their identity and only physical changes have occurred. the correct answer is D

Answer 2

Answer:

A chemical change occurs when the identity of a substance is changed. Silver tarnishing is a chemical change because silver and sulfur react to form a new substance, silver sulfide. In the other examples, the substances have not changed their identity and only physical changes have occurred. the correct answer is B

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Explanation: