Answer:
The signs of chemical change include changes in color, temperature, the production of light, changes in odor, and the formation of gases.
When the temperature increases, the kinetic energy of the particles increase this inturn makes them vibrate
Answer:
One of the errors for low percentage of magnesium could be because not all the magnesium may have reacted.
Explanation:
During the heating process, if the magnesium have not reacted completely, it can lead to low percentage of magnesium in the oxide formed. The product may still look a bit greyish rather than whitish after the heating process.
