which of the following are mixtures?
1. air (mostly n2 and o2)
2. salt (NaCl)
3. Salt Water
4. Water (h20)
is the answer 4 and 2 ?
2 answers
No. H2O is a compound as is NaCl (tble salt). Air is a mixture. Salt water is hard to say since I don't know enough about the source. If you dissolve NaCl in H2O you get a solution; if you do this in ocean water it may be a mixture because there are solid particles in there also.
air is a mixture and salt water is a mixture