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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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3O 4 , FeS, FeS 2 , FeCO 3 … khi tác<br />

2, HNO 3 , H 2 SO 4<br />

3 và b mol<br />

FeS 2<br />

hoàn toàn, đưa b<br />

Fe 2 O 3<br />

(A) a = 0,5b. (B) a = b.<br />

(C) a = 4b. (D) a = 2b.<br />

3 + O 2 t o<br />

2Fe 2 O 3 + 4CO 2 (1)<br />

4FeS 2 + 11O 2 t o<br />

2Fe 2 O 3 + 8SO 2 (2)<br />

1 11 a 11b<br />

nO n<br />

2 FeCO<br />

n<br />

3 FeS<br />

4 4<br />

2<br />

4 4<br />

n n a<br />

CO2 FeCO3<br />

n 2n 2b<br />

SO2 FeS2<br />

a 11b a 2b<br />

4 4<br />

a = b .<br />

8<br />

359

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