Which of the following most likely happens during a chemical change?
No new substances are formed.
Properties of a substance remain unchanged.
Composition of a substance is same as before.
Different substances than before are produced.
Apiece of copper has a temperature of 75.6 0c. when the metal is placed in 100.0 grams of water at 19.1 0c, the temperature rises by 5.5 0c. what is the mass of the metal?