Answer:
Increase in temperature increases the average kinetic energy of the reactant molecules, hence lowering the activation energy of the reaction.
Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions. The “ingredients” of a reaction are called reactants, and the end results are called products.
Answer: correct answer is D
It can be traced example in copper rod or iron or any other pure metal
A mixture that results when substances dissolve to form a homogeneous mixture is a solution.
Answer:
Compound
Explanation:
The given specie is a compound.
A compound is made up of two or more kinds of atoms/elements joined together in a definite grouping.
- The properties of a compound are distinct and different from those of the individual elements that are combined in its make-up.
- For this given specie, the elements are carbon, hydrogen and oxygen.
- So, this is a compound.
Elements are distinct substances that cannot be split - up into simpler substances. Such substances consist of only one kind of atom
