mраствора = 120 г
w%(H2SO4) = 5%
m(H2SO4) = m(раствора) * W% = 120 * 0.05 = 6 грамм
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mраствора = 120 г
w%(H2SO4) = 5%
m(H2SO4) = m(раствора) * W% = 120 * 0.05 = 6 грамм