What will be the product(s) of a single replacement reaction in which the reactants are Fe and 2 HCl?
A. H2Cl2Fe
B. FeCl2 + H2
C. FeH2 + Cl2
D. Fe + H2 + Cl2

Option B) FeCl2 + H2

Explanation:

Fe(s) + 2HCl(aq) → FeCl2(s) + H2(g)

The above is a single replacement reaction because Iron, Fe replaces hydrogen in its compound, HCl to form FeCl2 and liberate hydrogen gas.

Thus, the reaction shows that the more reactive iron, Fe reacts with the dilute hydrochloric acid, HCl to give products such as Iron(II) chloride, FeCl2 and hydrogen gas, H2.

what's the

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.