A. Formation of a gas. You can tell a chemical reaction has occurred through: formation of a precipitate, formation of a gas (also known as bubbles) unexpected color change, unexpected odor change, temperature change.
The type of bonding present in water (H2O) is hydrogen bonding.
Answer:
A variable is anything that can change or be changed. In other words, it is any factor that can be manipulated, controlled for, or measured in an experiment.
A: The reaction force accelerates the bat in a direction opposite that of the ball.
The kind of energy released when atoms are rearranged to form new bonds is called Chemical energy.
