Привет!
W(NaCl) = m(NaCl) / m(NaCl) + m(H2O) *100%
W(NaCl) = 40/ 200+40 * 100% = 40/240 * 100% = 0.17 * 100% = 17%
ответ: 17%
Привет!
W(NaCl) = m(NaCl) / m(NaCl) + m(H2O) *100%
W(NaCl) = 40/ 200+40 * 100% = 40/240 * 100% = 0.17 * 100% = 17%
ответ: 17%