Answer:
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance.
Explanation:
Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.
Answer:
I think it would be:
NaCO3 (s)-->Na2O (s) + CO2 (g)
True, I’m sorry if I’m wrong
he is a good scientist because he postulated that chemical reactions resulted in the rearrangement of the reacting atoms
