Use Dalton’s theory to explain why potassium nitrate from India or Italy has the same mass percents of K, N, and O.

1 answer:

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According to Dalton, every atom in an element has the same mass, and compounds are made up of a particular ratio of several elements. Thus the mass percentages of K, N, and O in potassium nitrate from India and Italy are the same.

The laws of conservation of mass and constant composition served as the foundation for Dalton's theory. In the first section of his thesis, he claims that all matter is composed of indivisible atoms. According to the second component of the theory, the mass and characteristics of every atom in a specific element are the same. Parts of the theory had to be modified based on the existence of subatomic particles and isotopes.

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The weight of the body in the air is .... the weight of the submerged body

stira [4]

Answer:

the correct answer is option 'b': More than

Explanation:

The 2 situations are represented in the attached figures below

When an object is placed in air it is acted upon by force of gravity of earth which is measured as weight of the object.

While as when any object is submerged partially or completely in any fluid the fluid exerts a force in upward direction and this force is known as force of buoyancy and it's magnitude is given by Archimedes law as equal to the weight of the fluid that the body displaces, hence the effective force in the downward direction direction thus the apparent weight of the object in water decreases.