Answer:
In a chemical reaction, only the atoms present in the reactants can end up in the products.
Explanation: No new atoms are created, and no atoms are destroyed. In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.
Answer:
Speeding up chemical reactions by lowering the activation energy.
Explanation:
It's Out Of C Or D Because It Explains It
Yes we never know what could happen in an eco system