In the classification of matter, how would we classify air?
a) pure mixture
b) pure substance
c) homogeneous mixture
d) heterogeneous mixture

What are some possible short and long term medical concerns for crew members on longer space exploration trips

Molecular models of two different substances are shown below. in the molecule on the left, the oxygen atom pulls on electrons more strongly than the hydrogen atoms. in the molecule on the right, the two oxygen atoms pull on the shared electrons with the same strength. water molecule, h,o oxygen molecule, oz when the two substances are put in the same container, they do not attract each other. why does this happen? a. they both contain oxygen. b. one is polar and one is nonpolar. c . they are both polar. d. they contain different elements.

Which locations on the map are low-pressure areas? a b c d e