Seeing signs of a chemical reaction does not always mean that a reaction is happening. For example, a gas (water vapor) is given off when water boils. ... You can tell that it is a physical change because water vapor can condense to form liquid water. In a chemical change, a new substance must be produced.
Answer:yes
Explanation:depending on the chemical properties and amount of the chemical and the state of matter and amount of mass
The law of conservation of mass States that mass in an isolation system is neither created nor destroyed by chemical reactions or physical transformations and the mass of the products in a chemical reaction must equal the mass of the reactants.
Answer: No
Explanation:
Example , Mercury is a Liquid metal
