Объяснение:
[tex] w = \frac{m1 w1}{m1+ m(h2o)} \times 100\%[/tex]
w = 250×0.03÷(250+125)×100%=20%
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Объяснение:
[tex] w = \frac{m1 w1}{m1+ m(h2o)} \times 100\%[/tex]
w = 250×0.03÷(250+125)×100%=20%