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6 H2O = 6 * 2*1u + 6*16u = 108u
masa hydratu = 20g
20g hydratu = 108u + 110u = 218u
Xg CaCl2 = 80 u
20g - 218u
xg - 110u
110*20/218 = xg xg = 10,1 g = masa substancji
Cp = msub / mr * 100%
Cp = 10,1g * 100% / 50 g + 20 g
Cp = 14,4 %