14) Air can be considered a mixture. Which statement helps describe air?
A)Air contains a fixed ratio of atoms.
B)The components of air separate into visible layers.
C)The components of air can be separated by chemical means.
D)The exact mixture of components varies from point to point.

the components of air can be separated by chemical means

D)  The exact mixture of components varies from point to point.

Explanation:

Here's why: Air can be considered a homogeneous mixture.The exact mixture of components varies from point to point. Air is made up of individual elements and compounds. When near a cow pasture, you can smell the compounds associated with cow patties but you can not see these as separate from the rest of the air

b..

is the correct one

explanation:

covalent bonds form as valence electrons are shared between two atoms. lewis structures and structural formulas are common ways of showing the covalent bonding in organic molecules. formal charge describes the changes in the number of valence electrons as an atom becomes bonded into a molecule.

big big big big big   bigbig big big big big big big big big big big big big big big big big big big big big big big big penis