m соли = 100×2%/100%=2г
m раствора = 100+100=200г
Wсоли = 2×100%/200=1%
ответ: 1%
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m соли = 100×2%/100%=2г
m раствора = 100+100=200г
Wсоли = 2×100%/200=1%
ответ: 1%