Hydrogen gas reacts rapidly with oxygen gas in the presence of a platinum catalyst. Which equation correctly represents this reaction?
Upper H subscript 2 (g) plus upper O subscript 2 (g) plus upper P t right arrow upper H subscript (g) plus upper O subscript 2 (g).
Upper H subscript 2 (g) plus upper O subscript 2 (g) right arrow upper H subscript 2 (g) plus upper O subscript 2 (g) plus upper P t.
2 upper H subscript 2 (g) plus upper O subscript 2 (g) right arrow with upper P t above it, 2 upper H subscript (g) plus upper O subscript 2 (g) plus upper P t.
2 upper H subscript 2 (g) plus upper O subscript 2 (g) right arrow with upper P t above it, 2 upper H subscript (g) plus upper O subscript 2 (g).

D. 2 upper H subscript 2 (g) plus upper O subscript 2 (g) right arrow with upper P t above it, 2 upper H subscript (g) plus upper O subscript 2 (g).

Explanation:

I just took the test

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.