What is the percentage by mass of carbon in #CH_3(CH_2)_5COOH#? Chemistry The Mole Concept Percent Composition 1 Answer anor277 Feb 6, 2017 Approx. #65%# Explanation: #%C="Mass of carbon"/"Mass of heptanoic acid"xx100%# #(7xx12.011*g*mol^-1)/(130.19* 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 3810 views around the world You can reuse this answer Creative Commons License