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Consider the equation below.

Mg(s) + 2HCl(aq) mc008-1.jpg MgCl2(aq) + H2(g)

Which compound is the gas in this chemical reaction?
Mg
HCl
MgCl2
H2

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MissPhiladelphia
I believe the correct answer from the choices listed above is the last option. It would be H2 or hydrogen the gas in the given chemical reaction. It is very clear in the subscript (g). Hope this answers the question. Have a nice day.

Answer: Option (d) is the correct answer.

Explanation:

The given chemical reaction is as follows.

  [tex]Mg(s) + 2HCl(aq) \rightarrow MgCl_{2}(aq) + H_{2}(g)[/tex]

When we use the subscript (s), the it means that the substance is solid. When we use the subscript (aq), then it means that the substance is aqueous. When we use the subscript (g), then it means that the subscript is gas.

Thus, in the given chemical reaction [tex]H_{2}[/tex] is the gas.

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