Marjorie is trying to determine the identity of an unknown substance. after running tests, she determines that the substance is insoluble in ccl4 with a density of about 2.2 g/ml. substance density boiling point solubility (in water) solubility (in ccl4) nacl 2.165 g/ml 1413°c soluble insoluble c10h8 1.14 g/ml 255°c insoluble soluble fecl3 2.898 g/ml 315°c soluble insoluble sio2 2.634 g/ml 2590°c insoluble insoluble using the data above, which of the following substances is most likely marjorie's unknown? a. fecl3 b. nacl c. sio2 d. c10h8

answer; natural resources;

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.