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M H2O =18 g/mol
mh2o= 25*18=450g
ms = 2*95=190g
mr=640g
190g MgCl2 -640g r-ru
x -100 r-ru
x=29,7g MgCl2 => Cp=29.7%
24) A)
D)
25) B)
D)