Which statement best describes chemical properties of matter? chemical properties, such as density, must be observed when a substance is in its natural state at room temperature and normal atmospheric pressure. chemical properties, such as reactivity, must be observed when a substance is in its natural state at room temperature and normal atmospheric pressure. chemical properties, such as combustibility, are generally observed as the identity of a substance changes and one or more new substances form. chemical properties, such as boiling point, are generally observed as the identity of a substance changes and one or more new substances form.

Option (c) is the correct answer.

Explanation:

Chemical properties are defined as the properties that bring changes in chemical composition of the combining substances.

For example, reactivity, combustibility, toxicity are all chemical properties.

Combustibility of a substance is defined as the ability of a substance to burn easily in the presence of air. This results in the formation of one or more new products.

Hence, we can conclude that the statement chemical properties, such as combustibility, are generally observed as the identity of a substance changes and one or more new substances form, best describes chemical properties of matter.

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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