Answer:
A. Increasing the temperature of a chemical reaction speeds up the reaction rate.
Explanation:
The higher the temperature is, the faster a chemical reaction will happen. Food rots slower in refrigerators because it is cold, outside, they rot faster.
It’s Tetracarbon dioxide :)
Answer:
Option D.
Explanation:
Some of the alpha particles Rutherford shot at the gold foil bounced back, some scattered; but the majority of them went right through. That meant there had to be some sort of positively charged subatomic particle in there that pulled them through, but it had to be at the center and couldn't take up a lot of room.
<h2>Answer;</h2>
Light is produced and heat is produced
<h2>Explanations</h2>
Chemical changes occurs when substances react to form new products. This reaction can be in form of a decomposition reaction.
During fireworks explosion, there is a reaction between charge of gunpowder which is been ignited with a fuse to produce a spark that leads to explosion.
The explosion leads to production of light and heat. Hence we can conclude that some signs that a chemical change takes place when a firework explodes is light is produced and heat is produced