What change causes a substance to change states of matter?
options:
a) the amount of kinetic energy in the substance’s particles changes
b) the temperature of the substance decreases a small amount
c) the temperature of the substance increases a small amount
d) a chemical reaction happens

Option (A) is the correct answer.

Explanation:

It is known that kinetic energy is the energy obtained by an object due to its motion.

And, when we increase the temperature of a substance then there will occur an increase in the kinetic energy of its molecules.

Also,      K.E =

So, kinetic energy is directly proportional to the temperature. As a result, on increasing the temperature more number of collisions will take place between the molecules.

Therefore, we can conclude that amount of kinetic energy in the substance’s particles changes its states of matter.

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.

the answer is barium and copper bromide