Question

I need facts about chemical changes

Answer 1

Answer:

Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. Facts

In a chemical reaction, new substances are created from reacting substances.

Chemical reactions can produce heat and light. For example, burning of wood.

Many rockets use the reaction of oxygen and hydrogen for their propulsion.

Answer 2

Explanation:

Chemical changes occur when a substance combines with another to form a new substance . Once the chemical properties of a substance are changed , it becomes another substance .