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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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13<br />

x thì<br />

x<br />

8 – x<br />

VD6:<br />

Nhóm IA IIA IIIA IVA VA VIA VIIA<br />

Na Mg Al Si P S Cl<br />

1 2 3 4 5 6 7<br />

Na 2 O MgO Al 2 O 3 SiO 2 P 2 O 5 SO 3 Cl 2 O 7<br />

4 3 2 1<br />

SiH 4 PH 3 H 2 S HCl<br />

VD7: 2O 5<br />

(A (B) cacbon.<br />

(C (D) photpho.<br />

2O 5<br />

3.<br />

M<br />

R<br />

%m<br />

R<br />

.100 % 82,35 %<br />

MR<br />

3<br />

R<br />

3<br />

(A) Zn. (B) Cu. (C) Mg. (D) Fe.<br />

3<br />

M<br />

M<br />

%m<br />

M<br />

.100 % 63,64 %<br />

MM<br />

32<br />

M = 56 M là Fe<br />

8<br />

42

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