Question

Help please... I'm in middle school, not high school, and i dont know what science I'm learning-

Which of the following pairs represent a homogenous mixture followed by a pure substance?

A. muddy water; carbon dioxide

B. ammonia; water

C. air; carbon dioxide

D. carbon dioxide; water

Answer 1

Answer: C. air; carbon dioxide

Step-by-step explanation:

Air will always have the same proportion of nitrogen, oxygen and argon, making it a homogenous mixture. Carbon dioxide will always have the same composition.