3.247 * 10^17 ions Mg2+ to moles

0.935 mol NH3 to molecules.

- 5.39×10⁻⁷ moles of Mg²⁺ ions

- 5.63×10²³  molecules of NH₃

Explanation:

We start from a statement that says:

1 mol of anything contains 6.02×10²³ particles

- Therefore we can say that  1 mol of Mg²⁺ ions has 6.02×10²³  Mg²⁺ ions.

3.247×10¹⁷ ions . 1 mol / 6.02×10²³ ions = 5.39×10⁻⁷ moles of Mg²⁺ ions

- 1 mol of ammonia contains 6.02×10²³ molecules

Therefore 0.935 moles of ammonia will contain (0.935 . 6.02×10²³ ) / 1 =

5.63×10²³  molecules of NH₃

b) mutualism

hope this : )

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be