Question

Which of the following are mixtures?

1) Salt water
2) Water (H₂O)
3) Salt (NaCl)
4) Air (Mostly N2 and O)

Answer 1

Salt water and air are examples of mixtures.

Step-by-step explanation:

Salt water and air are both examples of mixtures. Salt water is a homogeneous mixture or solution because the salt (NaCl) and water (H₂O) are thoroughly mixed with a constant composition throughout. Air is also a mixture of gases, such as nitrogen (N₂), oxygen (O₂), and carbon dioxide (CO₂), which are uniformly mixed.