It just is because science is science and it's supposed to make sense
Salt water is considered a compound since water is H20 (conpound) and Salt with is NaCl.
Answer:
,
,
,
, 
Explanation:
Empirical formula of the compound is the simplest ratio of elements present in the compound.
Empirical formula of compounds of chlorine with oxygen is as follows:
Compounds in which oxidation state of Cl is +1

Compounds in which oxidation state of Cl is +3

Compounds in which oxidation state of Cl is +4

Compounds in which oxidation state of Cl is +6

Compounds in which oxidation state of Cl is +7

Answer:
Examples of Chemical Changes
Burning wood.
Souring milk.
Mixing acid and base.
Digesting food.
Cooking an egg.
Heating sugar to form caramel.
Baking a cake.
Rusting of iron.
Heart: Pumps blood through the body
Bone: Provides structure
Stomach: Breaks down food into small particles
Lungs: Oxygenates blood