Write the simplest formula for the magnesium oxide assuggested
by the calculated mole ratio, that is, mgox.

Explanation:

Atomic number of magnesium is 12 and its electronic distribution is 2, 8, 2. Whereas the atomic number of oxygen is 8 and its electronic distribution is 2, 6.

Magnesium in order to attain stability needs to lose two electrons and hence it forms ion. Similarly, oxygen atom on gaining two electrons to complete its octet will form ion.

Therefore, magnesium and oxygen when chemically combine together then magnesium will donate its valence electrons to the oxygen atom leading to the formation of magnesium oxide.

Chemical formula of magnesium oxide is MgO. Hence, it means the value of x in is 1.

For cyclohexane compounds drawn in a chair conformation:   -axial bonds are vertical  -equatorial bonds are parallel to two bonds within the ring.  thus, as i assume the chair conformation is drawn:   -the x group is in an axial position, as are the five other vertical bonds.  -three axial bonds are on the top face of the ring  -the other three axial bonds are on the bottom face  the position of the second substituent on each ring carbon is equatorial.  gauche groups must be on an adjacent carbon such as carbon 6 and carbon 2, and also gauche groups are rotated by 60 degrees relative to each other.  drawing the newman projections for c1–c2 and c1–c6 aids in visualizing the groups that are gauche to the y group on c1.  click this link and watch some academic videos that may you more understand the topic 

Outermost (valence) electrons