Some Basic Concepts Of Chemistry Question 88

Question: 12 g of Mg (atomic mass 24) will react completely with hydrochloric acid to give

Options:

A) One mol of $ H _2 $

B) 1/2 mol of $ H _2 $

C) 2/3 mol of $ O _2 $

D) both 1/2 mol of $ H _2 $ and 1/2 mol of $ O _2 $

Show Answer

Answer:

Correct Answer: B

Solution:

[b] $ \underset{\begin{smallmatrix} 1,mole \\ \frac{1}{2}mole \end{smallmatrix}}{\mathop{Mg}},+2HCl\to MgCl _2+\underset{\begin{smallmatrix} ,1,mole \\ ,\frac{1}{2}mole(12g,of,Mg=\frac{1}{2}mol) \end{smallmatrix}}{\mathop{H _2}},\uparrow $



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