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Dane:
mr.= 250g.
cp.= 2 %
Szukane:
ms.= ?
m H20. =?
250g. rozt.---------------------100 %
x (mr.)----------------------------2%
x= 250g.*2%
------------- = 5g. substancji ( procent z procentem skróć)
100%
mH20= 250g.- 5g. = 245g wody
Pozdrawiam :)