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Which statement is true about physical changes and chemical changes? A. Chemical changes are not observable. B. Chemical changes always produce new substances. C. Physical changes can change physical and chemical properties. D. Physical and chemical changes cannot happen at the same time.

Respuesta :

B. Chemical changes always produce new substances
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Answer:

The answer is B. Chemical changes always produce new substances.

Explanation:

In physical changes the appearance of substances is altered but not their nature, that is, the substances remain the same. In chemical changes a substance is transformed into new substances with different properties. Therefore the correct option is B. Chemical changes always produce new substances.

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