How do you prepare 20 ml solution of tartaric acid in
ethylacetate if you have 5 grams of tartaric acid?

To prepare 20 M solution, you have to calculate the moles of tartaric acid firstly

moles = mass(g) / molar mass (g/mol)

Molarity (M) =moles / volume of solution(L)

 Volume (V) = moles / molarity

 Then you dissolve 5grams of tartaric acid in the result of the volume calculated above to get the concentration

Explanation:

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72