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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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2SO 4<br />

và 8,736 lít khí H 2<br />

khan là<br />

(A) 38,93. (B) 103,85. (C) 25,95. (D) 77,96.<br />

n HCl = 0,5.1 = 0,5 (mol);<br />

n 0,5.0,28 0,14 (mol).<br />

H2SO<br />

4<br />

n<br />

H 2<br />

8,736<br />

22, 4<br />

0,39 (mol).<br />

H<br />

+<br />

n n 2n 0,78 (mol) = 2n .<br />

HCl H2SO4 H2<br />

2 ta có:<br />

m = m + m =<br />

m m m<br />

Kim lo¹i 2<br />

gèc Cl gèc SO 4<br />

VD4:<br />

m = 7,74 + 0,5.35,5 + 0,14.96 = 38,93 (gam).<br />

38,93 (gam).<br />

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

MCl 2 + H 2<br />

m 73<br />

C % 14,6<br />

HCl (ctan)<br />

m .100 %= .100 500 (gam).<br />

HCl (dd)<br />

m dd = (m M + m HCl (dd) ) –<br />

m H2<br />

= (M + 500) – 2 = M + 498 (gam).<br />

mMCl<br />

M 71<br />

2<br />

C .100 % .100 % = 24,15 %<br />

MCl2<br />

m M 498<br />

dd<br />

Zn.<br />

3<br />

143

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