Question

PLEASE HELP!!!

Answer 1

B. Magnesium + Hydrogen Sulfide (Reactors) ---->  Magnesium Sulfide + Hydrogen (Products)

Answer 2

Answer:

B. Mg + $H_{2}S$ ⇒ MgS + $H_{2}$

Explanation:

There are several types of chemical reactions depending on the reaction mechanisms: combination, single-displacement, double-displacement, combustion, decomposition, combustion and redox reactions.

In this case we have a single-displacement reaction, which means that a new chemical species (Mg) replaces other (H) in a given chemical compound ($H_{2}S$). It happens because the electronegativity of H (a nonmetal) is greater than the Mg electronegativity.  Thus H attracts the electrons strongly.

That's why there is a transference of electrons from Mg to $H^{+}$. We can say that Mg reduces $H^{+}$.

Once $H^{+}$ is reduced to H, a covalent bond is formed between two hydrogen atoms, and then $H_{2}$ is released as a gas.