Массовая доля вещества в растворе:
ω = [m(в-ва)/m(p-p)] * 100 = (56/289)*100 = 19,38%
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Массовая доля вещества в растворе:
ω = [m(в-ва)/m(p-p)] * 100 = (56/289)*100 = 19,38%