10. Ninhydrin is a compound that reacts with amino acids and proteins to pro- duce a dark-colored complex. It is used by forensic chemists and detectives
to see fingerprints that might otherwise be invisible. Ninhydrin's composition
is 60.68% carbon, 3.40% hydrogen, and 35.92% oxygen. What is the empirical
formula for ninhydrin?

2b2t

explanation:

2b2t

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.