Question

state two laws of chemical combinationand justify them with an example each​

Answer 1

Answer:

Law of Constant Composition or Definite Proportions

French chemist,  J.L. Proust in 1799, discovered this law. It states that “A chemical compound is always found to be made up of the same elements combined together in the same fixed proportion by mass”.

For example, a sample of pure water from various sources or any country is always made up of only hydrogen and oxygen. These elements are always in the same fixed ratio of 1:8 by mass. We can prepare a sample of carbon dioxide in the laboratory. We can do this in various ways like:

Heating limestone

Burning coal in air

The action of dilute hydrochloric acid on marble

Heating sodium carbonate

Explanation:

Answer 2

Answer:

LAWS OF CHEMICAL COMBINATION consist of two laws:

Law of Conservation of Mass:

It states that matter can neither be created nor destroyed. eg: nuclear reaction.

Law of Definite Proportions:

It stated that a given compound always contains exactly the same proportion of elements by weight.

eg: ratio of 1:8 of hydrogen to oxygen in water.

Explanation:

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