Which of the following is a balanced chemical equation?

The correct answer is Option 4.

Explanation:

Law of conservation of mass states that mass can neither be created nor can be destroyed but it can only be transformed from one form to another form. This law also states that the total number of individual atoms on the reactant side will be equal to the total number of individual atoms on the product side.

Every balanced chemical equation follows law of conservation of mass.

For the given options:

Option 1:  

Here, number of chlorine and hydrogen atoms on the reactant and product side are not same. Thus, this equation is not balanced.

Option 2:  

Here, number of chlorine and bromine atoms on the reactant and product side are not same. Thus, this equation is not balanced.

Option 3:  

Here, number of hydrogen atoms on the reactant and product side are not same. Thus, this equation is not balanced.

Option 4:  

Here, number of hydrogen and oxygen atoms on both the sides are same. Thus, it is a balanced equation.

Hence, the correct answer is Option 4.

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.

c, liquids evaporate, creating a gas