aqueous solutions of lead nitrate and potassium iodide are combined in a test tube. the best proof that a chemical reactions has occurred would be that
a) the solution is yellow.
b) both reactants are aqueous solutions.
c) a yellow precipitate settles to the bottom.
d) lead and potassium are both metals and will replace each other.

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.

the link still does not work even when adding it to the url bar

explanation:

what is the question here. i think you messed up.

i think its 100.

hope this !