W= m (в-ва ) / m( р-ра) *100%
m(р-ра) = m(в-ва) + m (р-ра) = 25 + 135 = 160 г
W = 25 / 160 *100% = 15,62%
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W= m (в-ва ) / m( р-ра) *100%
m(р-ра) = m(в-ва) + m (р-ра) = 25 + 135 = 160 г
W = 25 / 160 *100% = 15,62%