"if the heat of fusion for water is 80. cal/g, how many calories are needed to melt 45.0 g of ice at 0 ? c? "

Energy released from changing the phase of a substance from the liquid phase to the solid phase at a constant temperature can be calculated by using the latent heat of fusion. Calculation are as follows:

 Energy = 80 cal / g (45.0 g)

Energy = 3600 cal

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.

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.