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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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mol Fe 2+ và Fe 3+ 1<br />

1<br />

mol Fe 2 O 3 2 SO 4 loãng (d<br />

2<br />

(A) 57,4. (B) 59,1. (C) 60,8. (D) 54,0.<br />

2 2<br />

(A) 24,24%. (B) 11,79%.<br />

(C) 28,21%. (D) 15,76%.<br />

3 2O 3 ,<br />

MgO, ZnO trong 500 ml axit H 2 SO 4<br />

(A) 6,81 gam.<br />

(C) 3,81 gam.<br />

(B) 4,81 gam.<br />

(D) 5,81 gam.<br />

4 2O 3 , Fe 3 O 4 tác<br />

(A) 9,75. (B) 8,75. (C) 7,80. (D) 6,50.<br />

2 và m gam FeCl 3 .<br />

5 3O 4 và Fe 2 O 3<br />

(A) 6,99. (B) 5,79. (C) 5,81. (D) 5,07.<br />

6 2O 3 , Fe 3 O 4 vào<br />

m 2 – m 1<br />

ã dùng là<br />

(A) 240 ml. (B) 80 ml. (C) 320 ml. D. 160 ml.<br />

2<br />

2<br />

344

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