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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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VD2: 3<br />

(A) 40 %. (B) 66,67 %. (C) 60 %. (D) 33,33 %.<br />

n CuO = x (mol).<br />

3 + 3CuO 3Cu + N 2 + 3H 2 O<br />

n 0,2<br />

n 0,3<br />

x = 0,2 (mol).<br />

CuO (thùc tÕ)<br />

H .100% .100% %.<br />

CuO (lÝ thuyÕt)<br />

66,67<br />

.<br />

1 3<br />

(A) 29,6 gam.<br />

(C) 30,4 gam.<br />

(B) 28,0 gam.<br />

(D) 25,6 gam.<br />

2 D 3 vào bình có 6,72 lít Cl 2 (đktc). Thành ph<br />

(A) 9,1 % N 2 ; 54,55 % HCl; 36,36 % NH 3 .<br />

(B) 33,33 % N 2 ; 66,67 % HCl.<br />

(C) 0 % N 2 ; 50 % Cl 2 .<br />

(D) 14,29 % N 2 ; 57,14 % HCl; 28,57 % NH 3 .<br />

3 Đ 3 2<br />

t pư t 2 mol 1:4. ( các khí đo cùng<br />

(A) 12 lít. (B) 14 lít. (C) 13 lít. (D) 16 lít.<br />

4 Cho 4,48 lít khí NH 3<br />

2<br />

(A) 30 %. (B) 40 %. (C) 50 %. (D) 60 %.<br />

2<br />

216

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