Question

What is the percent composition by mass of suifur in Na2SO?
(Molar mass of Na2SO.= 142 g/mol)

Answer 1

22.5%

Step-by-step explanation

% composition = Molar mass of S

------------------------ x 100

Molar mass of Na2SO4

= 32.065

------------ x 100

142

=0.225 x 100

= 22.5%