How many atoms of Na are in the following formula: 3Na(SO4)2

1) 3
2) 6
3) 2
4) 4

Only 3 atoms

Explanation:

The 3 came from the coefficient.

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

2b2t

explanation:

2b2t