m(H₂SO₄) = 0,15·100 = 15г
m₂р-ра= 100 + 25 = 125г
ω% = 15·100%/125 = 12%
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m(H₂SO₄) = 0,15·100 = 15г
m₂р-ра= 100 + 25 = 125г
ω% = 15·100%/125 = 12%