What is the percent composition by weight of Al in Al2(SO4)3? Chemistry The Mole Concept Percent Composition 1 Answer anor277 May 2, 2016 %Composition=Mass of componentMolar mass of compound ×100%, approx. 16% with respect to aluminum. Explanation: 2×26.98⋅g⋅mol−1342.15⋅g⋅mol−1×100% = ??% 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 1747 views around the world You can reuse this answer Creative Commons License