Answer:
a.
![K=\frac{[BaO]^2}{[Ba]^2[O_2]}](https://tex.z-dn.net/?f=K%3D%5Cfrac%7B%5BBaO%5D%5E2%7D%7B%5BBa%5D%5E2%5BO_2%5D%7D)
b.
![K=\frac{[MgO]^2}{[Mg]^2[O_2]}](https://tex.z-dn.net/?f=K%3D%5Cfrac%7B%5BMgO%5D%5E2%7D%7B%5BMg%5D%5E2%5BO_2%5D%7D)
c.
![K=\frac{[P_4O_{10}]^2}{[P_4][O_2]^5}](https://tex.z-dn.net/?f=K%3D%5Cfrac%7B%5BP_4O_%7B10%7D%5D%5E2%7D%7B%5BP_4%5D%5BO_2%5D%5E5%7D)
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.
![K=\frac{[BaO]^2}{[Ba]^2[O_2]}](https://tex.z-dn.net/?f=K%3D%5Cfrac%7B%5BBaO%5D%5E2%7D%7B%5BBa%5D%5E2%5BO_2%5D%7D)
b. 2 Mg + O2 ⇌ 2MgO
![K=\frac{[MgO]^2}{[Mg]^2[O_2]}](https://tex.z-dn.net/?f=K%3D%5Cfrac%7B%5BMgO%5D%5E2%7D%7B%5BMg%5D%5E2%5BO_2%5D%7D)
c. P4 + 5 O2 ⇌ P4O10
![K=\frac{[P_4O_{10}]^2}{[P_4][O_2]^5}](https://tex.z-dn.net/?f=K%3D%5Cfrac%7B%5BP_4O_%7B10%7D%5D%5E2%7D%7B%5BP_4%5D%5BO_2%5D%5E5%7D)
Best regards.
Black coffee since it is a darker colour and has a heavier taste
Hey there!
One mole is 6.022 x 10²³ atoms.
We have 0.25 moles.
0.25 x 6.022 x 10²³ = 1.5055 x 10²³
0.25 moles of magnesium contains 1.5055 x 10²³ atoms.
Hope this helps!
<h3 /><h3>Answer:</h3>
Option A)
Magnesium chloride, MgCl2, is a binary compound with bonds with relatively high ionic character.