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.

it can be icreased by increasing pressure.

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.