Write the equilibrium expressions for each of the following equilibria: a. 2 Ba + O2 ⇌ 2 BaO
b. 2 Mg + O2 ⇌ 2MgO
c. P4 + 5 O2 ⇌ P4O10

a.

b.

c.

Explanation:

Hello!

In this case, since the equilibrium expression is set up by dividing the products over the reactants and powering to the stoichiometric coefficient, we can proceed as follows:

a. 2 Ba + O2 ⇌ 2 BaO.

b. 2 Mg + O2 ⇌ 2MgO

c. P4 + 5 O2 ⇌ P4O10

Best regards.

that's what i got you can count the number of atoms