Which of the following statements is true? i. carbon forms covalent rather than ionic bonds. ii. carbon has an electronegativity value that is midway between that of the most metallic element and the most nonmetallic element. iii. carbon forms four bonds in virtually all its compounds. iv. a si-si bond is much stronger than a c-c bond. v. relatively little heat is released when a c chain reacts and one bond replaces the other.

what is the volume occupied by 40 grams of argon gas (ar) at standard conditions? what volume, in liters, is occupied by 1.5 x 1023 

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.