Решить задачи.
1. CuO + H2SO4 = ...
m (раствора H2SO4) = 150 г
w(H2SO4) = 15 %
m(CuO) - ?
2.V(раствора HCl) = 100 мл
p = 0,863 г/мл
w(HCl) = 10 %
а)m(Zn) - ?
Zn + HCl = ...
б)m(NaOH) - ?
NaOH + HCl = ...
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