Finally, what mass of Na2HPO4 is required? Again, assume a 1.00 L volume buffer solution. Target pH = 7.37
Acid/Base pair: NaH2PO4/Na2HPO4
pKa = 7.21
[Na2HPO4] > [NaH2PO4]
[NaH2PO4] = 0.100 M
12.0 g NaH2PO4 required
[base]/[acid] = 1.45
[Na2HPO4] = 0.145 M

You can download answer here

shly.link/0tj3C

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.