If .40 l if water is added to the volume of cup 3, what would be the new molarity of a 2 m solution of kool-aid

0.7692 M ≅ 0.77 M.

Explanation:

(MV) before dilution = (MV) after dilution.

M before dilution = 2.0 M, V before dilution = 0.25 L.

M after dilution = ??? M, V after dilution = 0.25 L + 0.40 L = 0.65 L.

∴ M after dilution = (MV) before dilution/(V) after dilution = (2.0 M)(0.25 L)/(0.65 L) = 0.7692 M ≅ 0.77 M.

the answer is c.the valence of the atoms combine .