Question

Chemical properties


include mass and color


include changed that alter the identity of the substance.


include changes of state of a substance.


can be observed without altering the identity of the substance.

Answer 1

You’ve listed several statements about chemical properties. Here’s which are correct and why:

1. "include mass and color" — False.
Mass and color are physical properties, not chemical properties.

2. "include changes that alter the identity of the substance." — True.
Chemical properties describe how a substance reacts or transforms into different substances (e.g., flammability, reactivity with acids, oxidation).

3. "include changes of state of a substance." — False.
Changes of state (melting, boiling, condensing) are physical changes/properties because the substance’s chemical identity stays the same.

4. "can be observed without altering the identity of the substance." — False.
Chemical properties generally are revealed only when a chemical change occurs, which alters the substance’s identity.

If helpful: examples — chemical properties: combustibility, reactivity with water/oxygen/acids, pH, enthalpy of reaction; physical properties: mass, color, density, melting/boiling points, conductivity.