تابع...تحضير المواد الكيميائيه

thanks waleed,this's another method by knowing (density &purity) ‏
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N*V=wt/eq.wt




wt---->ml.gm------->gm(y)







x=(% of purity * y)/(100% impure)







x-->pure gm. of sub.








d=x/v -----> v=x/d






===>take this V(ml) in M.F &complete it to mark by water

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