What is the percent composition by mass of nitrogen in #(NH_4)_2CO_3#? Chemistry The Mole Concept Percent Composition 1 Answer anor277 Mar 30, 2017 #%N="Mass of nitrogen"/"Molar mass of ammonium carbonate"xx100%# Explanation: And thus, #%N=(2xx14.01*g*mol^-1)/(96.09*g*mol^-1)~=27%# #"by mass."# 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 4641 views around the world You can reuse this answer Creative Commons License