How many grams of KI can be dissolved in 300gH2O at 10C?

Explanation:

Look at the graph attached. It contains the solubility curves for severals solutes.

I have marked the solubility of KI at 10ºC: look the intersection of the vertical and horizontal dotted red lines: the corresponding solubility is read on the vertical axis. It is slightlly above the midpoint between 130 y 140 g per 100 g of water. Thus, you can approximate to 136 g / 100 g of water.

You need the number of grams dissolved in 300 g of water, thus mutilply by 300:

Thus, about 408g of KI can be dissolved in 300 g of water at 10ºC.

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.