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8 = ms/250 *100
0,08 = ms/250
ms = 250 * 0,08
ms = 20gramow tego kwasu sie znajduje w roztworze
stężenie procentowe to 8 %
czyli masa kwasu to 250 g * 8% = 20 g
Mr= 250 g
Cp= 8%
Ms= 250g * 8%
Ms=20g