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  4. The number of moles of water present in 180 gm of water is

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Q. The number of moles of water present in $180\, gm$ of water is

AIIMSAIIMS 1996Some Basic Concepts of Chemistry

Solution:

Molecular weight of water $= 18$

$\therefore \,\,\,$ No. of moles of water $=\frac{\text { Mass }}{\text { Molecular mass }}$

$=\frac{180}{18}=10$ moles