16. Answer the following questions for the reaction a. Balance the reaction. Al(s) + O2(g) → Al2O3 (s)
b. Is this reaction a decomposition, combination, single-displacement, or double-displacement reaction?
c. If 9.45 g of Al (s) reacts with 4.39 L of O2 (g) at 1.20 atm and 54.3°C, how many grams of Al2O3 (8)
will be produced?
d. How many grams of excess reactant remain?
e. When the reaction is performed, 11.74 g of Al2O3 are experimentally produced. What is the percent
yield of the reaction?

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.