September 2021 0 8 Report
Решите задачу Дано:
m(раствора H2SO3)=246 г
W (Массовая доля) (H2SO3)=20%
m(раствора KOH)= 420 г
W (массовая доля) ( KOH)= 10%
найти:
m (веществ) - ?
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