What does the law of conversation of mass state

Law of conservation of mass states that

"Mass can never be created nor lost by any chemical reaction"

The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction.

Explanation:

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the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

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