4na+o2-> 2na2o how many grams of na2o are produced when 95.7g of na reacts?

4Na+O2->2Na2O

Given: 95.7gNa
Unknown: ?gNa2O
Plan: gNa to molNa to molNa2O to gNa2O
Relationships: Na ≈ 23 g/mol and O ≈ 16 g/mol;
              Na2O has 2 Na and 1 O so 23*2 = 46+16 = 62 g/molNa2O

Solve: 95.7 gNa * 1 molNa/23 gNa * 2molNa2O/4molNa * 62gNa2O/1molNa2O ≈ 128.99gNa2O 

My work might be wrong so please check.

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

the answer is c

tell me if wrong