1kg of gold will have seven times the volume 1 kg of aluminium. True or false explain

False (1). Reference to, or calculation of, different densities leading to

different masses (1) (2 marks)

b True (1). Density of olive oil is less than water and sea water but greater

than that of alcohol (1) (2 marks)

c False (1). Gold has a greater density than aluminium so equal masses

for both mean that gold will have a volume that is much less than that

of aluminium (about 7

1 of that of aluminium) (1) (2 marks)

d True (1). Use of mass = density × volume for both leads to the same mass;

or a similar argument (1)

Explanation:

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.