2. why do you believe knowing how elements and compounds react together is essential in everyday matters?

It is essential in everyday matters to have a basic knowledge of chemistry and understand how elements and compounds react. This is true of all people, even those with no particular interest on science. The reason for this is that everything that surrounds us is made out of elements and compounds. Therefore, understanding how these work can allow us to better understand the world that surrounds us. Moreover, it can avoid accidents when we deal with dangerous compounds, such as when we cook or clean.

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in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.