Question

Given the following equation: Mg + 2HCl → MgCl2 + H2

How many moles of H2 can be produced by reacting 4 moles of HCl?

Answer 1

Answer: 2 moles of hydrogen gas are produced with the given amount of HCl

Explanation:

Given chemical reaction:

$Mg+2HCl\rightarrow MgCl_2+H_2$

Given moles of HCl = 4 moles

By the stoichiometry of the reaction:

If 2 moles of HCl produces 1 mole of hydrogen gas

Then, 4 moles of HCl will produce = $\frac{1}{2}\times 4=2mol$ of hydrogen gas

Hence, 2 moles of hydrogen gas are produced with the given amount of HCl

Answer 2

Answer: 1 mole

Explanation: