which statement best describes chemical properties of matter?\no chemical properties, such as density, must…

which statement best describes chemical properties of matter?\no chemical properties, such as density, must be observed when a substance is in its natural state at room temperature and normal atmospheric pressure.\no chemical properties, such as reactivity, must be observed when a substance is in its natural state at room temperature and normal atmospheric pressure\no chemical properties, such as combustibility, are generally observed as the identity of a substance changes and one or more new substances form.\no chemical properties, such as boiling point, are generally observed as the identity of a substance changes and one or more new substances form.

which statement best describes chemical properties of matter?\no chemical properties, such as density, must be observed when a substance is in its natural state at room temperature and normal atmospheric pressure.\no chemical properties, such as reactivity, must be observed when a substance is in its natural state at room temperature and normal atmospheric pressure\no chemical properties, such as combustibility, are generally observed as the identity of a substance changes and one or more new substances form.\no chemical properties, such as boiling point, are generally observed as the identity of a substance changes and one or more new substances form.

Answer

Answer:

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

Brief Explanations:

Chemical properties involve chemical changes. Combustibility requires a substance to react and form new substances, which is characteristic of observing chemical properties. Density and boiling - point are physical properties. Reactivity can be observed in chemical reactions where new substances are formed, but the description in option B is not as comprehensive as option C.