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xuanhalak
2 năm trước
Cho 40 gam Iron ( III ) oxide Fe2O3 tác dụng vừa đủ với m (gam) dung dịch sulfuric acid H2SO4 10% . Tính C% của muối thu được. Cho biết: Fe = 56; O=16; H=1; S = 32.
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