What is the percent by weight of sodium in sodium sulfate? Chemistry The Mole Concept Percent Composition 1 Answer anor277 Aug 23, 2016 #"Percentage sodium"# #=# #"Mass of sodium"/"Mass of sodium sulfate"# #=# #??%# Explanation: #"Mass of sodium"/"Mass of sodium sulfate"# #=# #(2xx22.99*g*mol^-1)/(142.04*g*mol^-1)xx100%# #~=# #30%# Answer link Related questions What is mole percent? Question #e2e8b Question #bc737 Question #bc73b Question #e2e8f Question #b9857 Question #b985b Question #fee41 Question #c5c01 Question #bc73f See all questions in Percent Composition Impact of this question 5247 views around the world You can reuse this answer Creative Commons License