Question

the law of chemical comenation​

Answer 1

Laws Of Chemical Combination For Elements And Compounds. In simple terms, this law states that matter can neither be created nor destroyed. In other words, the total mass, that is, the sum of mass of reacting mixture and the products formed remains constant.

Answer 2

The laws of chemical combination lay the basic foundation that decides the different ways in which the atoms and the molecules combine/react with each other in a chemical reaction. The are four laws of chemical combination:

Law of conservation of mass: The law of conservation of mass states that the net change in mass of the reactants and products before and after a chemical reaction is zero. In simple words this law states that “Mass can neither be created or destroyed during a chemical reaction”

Law of constant proportion: The law of constant proportions states that when a compound is broken, the masses of the constituent elements remain in the same proportion.

Law of multiple proportions: The law of multiple proportions states that when two elements form two or more compounds between them, the ratio of the masses of the second element in each compound can be expressed in the form of small whole numbers. This law was proven by John Dalton.

Law of reciprocal proportions: The law of reciprocal proportions states that when two different elements combine with the same quantity of the third element, the ratio in which they will do so will be the same or a multiple of the proportion in which they combine with each other. This law is better understood with an example:

Oxygen and sulfur react with copper to create copper oxide and copper sulfide, respectively. Sulfur and oxygen also react with each other to form sulfur dioxide (SO2). Therefore,

in CuS, Cu:S= 63.5:32

in CuO, Cu:O= 63.5:16 which implies S:O= 32:16= 2:1

Now, in SO2, S:0= 32:32=1:1

Thus the ratio between the two ratios is as follows:

2/1 : 1/1 = 2:1