What is the percent composition of #NiO#, if a sample of #NiO# with a mass of 41.9 g contains 33.1 g #Ni# and s g #O#? Chemistry The Mole Concept Percent Composition 1 Answer anor277 May 30, 2017 Well it has #79.0%# metal content......... Explanation: #%Ni=(33.1*g)/(41.9*g)xx100%=79.0%# #%O=(41.9*g-33.1*g)/(41.9*g)xx100%=21.0%# 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 8892 views around the world You can reuse this answer Creative Commons License