Ответ:
m(p-pa) = m(NaCl) + m(H2O) = 25 + 475 = 500 г
W(NaCl) = [m(NaCl)/m(p-pa)]x100% = [25/500]x100% = 5 %.
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Ответ:
m(p-pa) = m(NaCl) + m(H2O) = 25 + 475 = 500 г
W(NaCl) = [m(NaCl)/m(p-pa)]x100% = [25/500]x100% = 5 %.