Question

classify the following into element, compound, and mixture :
brass, gold, hydrogen, sulphide, air

Answer 1

brass.....mixture
gold.....mixture.
hydrogen.....compound
sulphide.....compound
air......mixture

Answer 2

Hi frnd............

Mixture       -    Brass and air 
Element      -    Gold
Compound -     Hydrogen and Sulphide 

HOPE IT HELPS...........