For each of the following precipitation reactions, plete and balance the equation, indicating de
which product is the precipitate.
a. (NH4)2S(aq) + CoCl2(aq) →
b. FeCl3(aq) + NaOH(aq) →
c. CuSO4(aq) + Na2CO3(aq) -

did anyone actually do this? like if anyone has submitted this i rly need .

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.

a electronegativity decreases beacuse the size of nucleus is bigger.

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a