What is the percentage of #Cl# in #Al(ClO_3)_3#? Chemistry The Mole Concept Percent Composition 1 Answer anor277 Jul 1, 2016 Approx. #40%# Explanation: #"Percentage chlorine"# #=# #"Mass of chlorine"/"Mass of aluminum chlorate"# #=# #(3xx35.45*g*mol^-1)/(277.34*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 5460 views around the world You can reuse this answer Creative Commons License