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Learn more about Person whose achievement make world beautiful place to live 
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Person - Part Two
=========================================================== Person Conti... [101] Louis Seymour Bazett Leakey (1903-1972) He discovered the Origins of Man DARWIN claimed with considerable evidence that ‘man’ evolved from humanlike apes. But these conjecture...
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Person - Part One
This blog is dedicated to those person whose hard work, Imagination , creativeness make this work beautiful place for us to live. Blog contain list of famous person and their achievement in respective field. =================================================...
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Person
This blog is dedicated to those person whose hard work, Imagination , creativeness make this work beautiful place for us to live. Blog contain list of famous person and their achievement in respective field. =================================================...
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Person
This blog is dedicated to those person whose hard work, Imagination , creativeness make this work beautiful place for us to live. Blog contain list of famous person and their achievement in respective field. =================================================...
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NEW substances are made in chemical reactions. But the question of whether mass is conserved in a chemical reaction remained unanswered. The French scientist Lavoisier provided a definite answer to this question.
Lavoisier heated mercury in a closed vessel in an oven for 14 days to ensure that all the mercury was converted into red-lead. The weight of the vessel was found to be the same as before. When the seal was broken, air rushed in to take the place of oxygen used in the reaction. The new weight of the vessel including pieces of glass was more, showing weight of oxygen used. Now Lavoisier took all the red-lead in a sealed vessel and concentrated solar rays using a convex lens to heat red-lead to separate oxygen and mercury. The weight of oxygen liberated was equal to that of air that had rushed in, proving that mass is conserved in chemical reactions.
Today we are able to describe chemical reactions by chemical equations thanks to the experiments of Lavoisier. The new method of preparing oxygen was an incidental gain!
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