The law of conservation of mass states that in a chemical reaction the mass of the reactants
equals the mass of the products. Based on this information, what mass of hydrogen (H2)
was produced in this reaction?

A. 2 g

B. 4 g

C. 72 g

D. 144 g

please leave an explanation
thank you!

2 g

Explanation:

Since both sides have to be equal, add together the weight from the left side to get the total of 137

Subtract 135 from that

The answer is 2.

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.