5x10-6 mol Na2C2O4 bileşiğinde kaç tane O atomu vardır? How many oxygen atoms are present in 5x10-6 mol Na2C2O4 ?

There are 1.204 x 10¹⁹ atoms O

The empirical formula is the smallest comparison of atoms of compound forming elements.  

A molecular formula is a formula that shows the number of atomic elements that make up a compound.  

1 mol of molecule Na₂C₂O₄ :

There are 4 mol of O in 1 mol of molecule Na₂C₂O₄

So for 5 x 10⁻⁶ mol Na₂C₂O₄ :

1 mole = 6.02.10²³ particles , so number of atoms O :

fdvwsa gfwsargebgeebbfwfwffw gwf   vgwgw gw f gwgw fgw v v dsv dwfff