Question

Classify each one of the following as pure substances or mixtures:
1. air
2. neon
3. liquid nitrogen
4. hydrochloric acid
5. petrol
6. river water
7. carbon dioxide
8. aluminium
9. window glass
10. milk
11. distilled water
12. sodium chloride
13. gold ore
14. seawater
15. cola drink
16. vinegar
17. krypton
18. brass
19. marble
20. titanium
21. ozone
22. ice
23. butter
24. copper
25. polystyrene
26. sulfur
27. paper
28. concrete
29. steel
30. glucose
Sort all pure substances into compounds and elements and sort all mixtures into heterogeneous mixtures and homogeneous mixtures.

Answer 1

Please refer to the attachment for a complete classification of your specified matter.

Answer 2

compounds=1,2,712
elements=2,3,8,11,13,17,20,24,26
heterogeneous mixtures=I think that none of them are heterogenous mixtures

homogeneous mixtures=all the remaining numbers