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(B) In water,$(H_2O)$,hydrogen and oxygen are always present in a fixed ratio by mass.The atomic mass of hydrogen is $1 	ext{ u}$ and the atomic mass

Vedclass · Accepted Answer

$1: 8$

Vedclass · Answer

(B) In water,$(H_2O)$,hydrogen and oxygen are always present in a fixed ratio by mass.The atomic mass of hydrogen is $1 	ext{ u}$ and the atomic mass of oxygen is $16 	ext{ u}$.In one molecule of water $(H_2O)$,there are $2$ atoms of hydrogen and $1$ atom of oxygen.Total mass of hydrogen $= 2 	imes 1 = 2 	ext{ u}$.Total mass of oxygen $= 1 	imes 16 = 16 	ext{ u}$.The ratio of the mass of hydrogen to the mass of oxygen is $2: 16$,which simplifies to $1: 8$.

In a compound such as water,the ratio of the mass of hydrogen to the mass of oxygen is always

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