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Cm = ?
Cp = 14%
dr = 1,1 g/cm³ = 1100 g/dm³
M NaCl = 23 + 35,5 = 58,5 g/mol
Cm= Cp*dr/100%*M
Cm = (14% * 1100 g/dm³) / 58,5 g/mol * 100% ≈ 2,76 mol/dm³