Question

what are some observations that indicate a chemical change? gas formation formation of a precipitate (solid from a liquid solution) color, odor, & temperature change all of these options indicate a chemical change

Explanation:

Gas formation, formation of a precipitate, and color - odor - temperature changes are all common signs of a chemical change. A chemical change results in the formation of new substances with different chemical properties. Gas formation indicates the production of a gaseous product. Precipitate formation shows the creation of an insoluble solid from a solution. Color, odor, and temperature changes often accompany the breaking and forming of chemical bonds.

Answer:

D. All of these options indicate a chemical change