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BÀI TẬP TRẮC NGHIỆM HÓA ĐẠI CƯƠNG VÀ VÔ CƠ CẨM NANG DÙNG LUYỆN THI THPTQG CHẤT LƯỢNG CAO (COLOR BOOK)

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8 xO y<br />

2SO 4 2<br />

xO y là<br />

(A) Cr 2 O 3 . (B) FeO. (C) Fe 3 O 4 . (D) CrO.<br />

9<br />

2O 3<br />

2<br />

(A) 1,120. (B) 0,896.<br />

(C) 0,448. (D) 0,224.<br />

A 2<br />

3O 4 nung nóng. Sau<br />

(A) 0,448. (B) 0,112.<br />

(C) 0,224. (D) 0,560.<br />

B<br />

2O 3 . Hoà tan hoàn toàn<br />

Ba(OH) 2 (dư) thì thu đ<br />

(A) 76,755. (B) 73,875.<br />

(C) 147,750. (D) 78,875.<br />

C 3O 4<br />

3O 4 thành Fe. Hoà tan<br />

thu đư<br />

2 (đktc). H<br />

(A) 12,5 %. (B) 60 %.<br />

(C) 20 % . (D) 80 %.<br />

2SO 4 loãng<br />

D 2O 3 i nung nóng trong đi<br />

NO (đktc). Giá tr<br />

(A) 2,24 lít.<br />

(C) 10,08 lít.<br />

(B) 4,48 lít.<br />

(D) 3,36 lít.<br />

3 thu đư c V lít khí<br />

5<br />

347

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