At one time, chemists thought that the formula of a binary compound was the simp

Question

At one time, chemists thought that the formula of a binary compound was the simplest formula possible. For example, the chemical formula of water was thought to be HO and that of ammonia was thought to be NH. Given that •0.832 g of oxygen combines with 0.104 g of hydrogen •H is assigned an atomic mass of 1.00 amu calculate the atomic mass of oxygen based on the formula HO. Given that •0.403 g of nitrogen combines with 0.0864 g of hydrogen •H is assigned an atomic mass of 1.00 amu calculate the atomic mass of nitrogen based on the formula NH.

Explanation / Answer

ratio of H:O = 0.104g/0.832g

Assume that atomic weight of O is X

0.104g/0.832g = 1/X

or, X = 8

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assume that atomic mass of N is X

0.0864/0.403 = 1/x

or, X = 4.66

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