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.
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option C
Chemical properties, such as combustibility, are generally observed as the identity of a substance changes and one or more new substances form.
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Chemical properties, such as combustibility, are generally observed as the identity of a substance changes and one or more new substances form.
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