Consider the air we breathe. What is it composed of?
A)A heterogeneous mixture of nitrogen, oxygen, and argon, in decreasing order
B)A homogeneous mixture of nitrogen, oxygen, and argon, in decreasing order
C)A heterogeneous mixture of oxygen, nitrogen, and argon, in decreasing order
D)A homogeneous mixture of oxygen, nitrogen, and argon, in decreasing order

Question

Quizplus · Accepted Answer

The air we breathe is a homogeneous mixture because its composition is uniform throughout. It primarily consists of nitrogen (about 78%), oxygen (about 21%), and argon (about 1%), along with other gases in trace amounts, in decreasing order of their proportions.

Consider the Air We Breathe