What is the percentage composition by mass of nitrogen in calcium nitrate? Chemistry The Mole Concept Percent Composition 1 Answer anor277 Nov 26, 2017 #%N="Mass of nitrogen in one mole of salt"/"Mass of one mole of calcium nitrate"xx100%# Explanation: So we gots #Ca(NO_3)_2#, whose formula mass #=164.09*g*mol^-1# #%N=(2xx14.01*g*mol^-1)/(164.09*g*mol^-1)~=20%# 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 7020 views around the world You can reuse this answer Creative Commons License