Pls Help
What is the difference between reactants and products?
Name three properties that can be observed in a substance.
What is the Law of Conservation of Matter, and how does it apply to chemical reactions?
True or false: A physical change results in new substances being formed.
True
False
If you have 12 atoms of hydrogen before a chemical reaction, how many atoms of hydrogen will be present after the chemical reaction?
Why does the mass of a substance remain the same after a chemical reaction?
How does a catalyst affect a chemical reaction?
Give an example of a chemical reaction during which a single substance breaks down.
How can scientists use their knowledge of chemical reactions?
Answers
Answer:
The substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.
Some of the physical properties of substances include their:
Changing states without altering or changing the identity of the substance.
Mass.
Density.
Volume.
Boiling point.
Melting point.
Conductivity.
Heat capacity
Explanation:
This law states that, despite chemical reactions or physical transformations, mass is conserved — that is, it cannot be created or destroyed — within an isolated system. In other words, in a chemical reaction, the mass of the products will always be equal to the mass of the reactants.