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In chemistry, the law of definite proportions and also the elements, sometimes called Proust's Law, states that a chemical compound always contains exactly the same proportion of elements by mass. An equivalent statement is the law of constant composition, which states that all samples of a given chemical compound have the same elemental composition.
This observation was first made by the French chemist Joseph Proust based on several experiments conducted between 1798 and 1804. Based on such observations, Proust made statements like this one, in 1806:
What else can I help you with?
Does a mixture obey the law of definite composition?
Yes, a mixture does not obey the law of definite composition. Mixtures can have varying proportions of different substances, whereas compounds, which obey the law of definite composition, have a fixed ratio of elements.
36 A naturally occurring solid inorganic substance with a definite chemical composition?
A mineral is a naturally occurring solid inorganic substance with a definite chemical composition. Minerals are typically formed through various geological processes and can be found in different environments on Earth. They can range in composition from simple elements to complex compounds.
Do compounds have variable composition?
No. Compounds have a definite composition, therefore they are pure substances. For example, water always has the formula H2O, sodium chloride (common table salt) always has the formula NaCl, and glucose (blood sugar) always has the formula C6H12O6.
What four things must a mineral have to be considered a mineral?
a mineral is defined as any inorganic substance that occurs in nature and has a definite chemical composition.
Four criteria that make a mineral?
A mineral must be a solid, have a definite chemical formula, have a crystalline structure, and be naturally occuring.
When was the law of definite proportions developed?
The law of definite proportions was developed by Joseph Proust in 1806.
Is the law of definite composition the same as the law of definite proportion?
yes it is .. also called prousts law
Does a mixture obey the law of definite composition?
Yes, a mixture does not obey the law of definite composition. Mixtures can have varying proportions of different substances, whereas compounds, which obey the law of definite composition, have a fixed ratio of elements.
What is the law that states that a chemical compound always contains the same elements in exactly the same proportions by w eight and mass?
The law you are referring to is the Law of Definite Proportions. This law states that a chemical compound always contains the same elements in the same proportions by mass, regardless of the source of the compound.
What is the chemical equation of the law of definite composition?
This law hasn't a chemical equation !
Who developed the law of Definite Proportions?
Joseph Proust
Is it true that a chemical has a definite composition?
Yes, after the Law of definite proportions; but now it is clear that this law is not applicable to all known chemical compounds.
What theory states that a given compound will always contain exactly the same proportion of elements by weight?
Law of definite proportion or law of definite composition.
How is the Law of definite composition and proportion relate to the empirical formula?
The Law of Definite Composition states that a compound will always have the same proportion of elements by mass. This relates to the empirical formula because the empirical formula gives the simplest whole number ratio of the elements in a compound, which reflects the fixed composition of elements as per the Law of Definite Composition.
Is the law of definite proportions says that the composition of a compound always the same?
always the same
What you mean by nonstoichiometry?
The chemical composition of nonstoichiometric compounds do not respect the law of definite proportions.
Explain how your class's results in this experiment support the law of definite composition?
The law of definite composition states that a compound will always have the same proportion of elements by mass regardless of the source or how it was prepared. In the experiment, if the class obtained consistent results in terms of the mass of elements present in the compound, it would support this law. This consistency would demonstrate that the compound was formed with a fixed ratio of elements, reinforcing the idea that compounds have a definite composition.
