H2O is the Bronsted-Lowry acid in the forward reaction, donating an H+ to CH3, and CH4 is the Bronsted-Lowry acid in the reverse direction, donating an H+ to OH-.
The molecular formula of dimethyl sulfoxide is
. Molar mass of dimethyl sulfoxide is 78.13 g/mol. Calculate number of moles as follows:

From the molecular formula, 1 mole of dimethyl sulfoxide contains 2 moles of Carbon, 6 moles of Hydrogen, 1 mole of Sulfur and 1 mole of oxygen.
Thus, 91.38 moles of dimethyl sulfoxide will have:
Carbon :

Hydrogen:

Sulfur:

Oxygen:

Since, 1 mole of an element equals to
atoms thus, number of atoms can be calculated as:
Carbon:

Thus,

Hydrogen:

Thus,

Sulfur:

Thus,

Oxygen:

Thus,

Therefore, number of C, S, H and O atoms are
respectively.
Ionic bond is the bond that creates a crystalline structure
Answer:
The answer to your question is:
Explanation:
Ionic compound is formed when a metal and a nonmetal are attached.
If we have MgX₂, that means that the nonmetal must have a valence of -1.
From the list the nonmetals with a valence of -1 are:
Bromine(Br) and fluorine(F).