Question

Question 25

Answer 1

Answer:

o The result of a chemical change is a different  composition; in a physical change, the composition  remains the same.

Explanation:

In a chemical change, new kinds of matter are produced although the atoms are the same.

For physical changes, no new kinds of matter formed. Only the state of substances changes.

• Most chemical changes are usually irreversible
• Physical changes are reversible in most parts.
• Changes in state and form are salient characteristics of physical changes.
• When new products are formed from the reactants, it is an indicator of a chemical change.