What is the mass percent of nitrogen in ammonium carbonate, #(NH_4)_2CO_3#? Chemistry The Mole Concept Percent Composition 1 Answer anor277 May 15, 2016 A little less than #28%#. Explanation: #"% nitrogen by mass"# #=# #"Mass of nitrogen"/"Molar mass of ammonium carbonate"xx100%# #(2xx14.01*g*mol^-1)/(96.09*g*mol^-1)xx100%# #=# #??# 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 22192 views around the world You can reuse this answer Creative Commons License