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Cmol = 0,1 mol/dm3
V = 0,2 dm3
Cmol = ms /M x V
M – masa molowa
M NaBr = 23 +80 = 103 g/mol – masa molowa bromku sodu
ms = Cmol x M x V
ms= 0,1 mol/dm3 x 103 g/mol x 0,2 dm3
ms = 2,06 g