What is the percent by mass of carbon in acetone, #C_3H_6O#? Chemistry The Mole Concept Percent Composition 1 Answer anor277 Jun 11, 2016 #"Mass of carbon"/"Mass of acetone"xx100%# #=# #"Percentage by mass Carbon"#. Explanation: We take the formula mass of acetone, #58.08*g*mol^-1#, and perform the calculation, #(3xx12.011*g*mol^-1)/(58.08*g*mol^-1)xx100%# #~=# #60%# 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 28765 views around the world You can reuse this answer Creative Commons License