_C6H8 + _O2 > _H2O + _CO2

C6H8+8O2 -> 4H2O + 6CO2

Explanation:

I first started with the carbons. On the left side we have 6 carbons, and on the left side only one, so I started by having 6CO2's on the right side. This then gave me 12O's to balance on the other side. I also realized that H2O only has 1 O which would be impossible to balance as it would mean an odd number of oxygens on the right and an even number on the left, so I made it 4H2O to also accommodate for the 8 hydrogens on the left side. Finally I added up the oxygens on the right (total of 16: 12 from the carbon dioxides and 4 from the water) and added an 8 to the oxygens on the left.

Hope this helped!

a graduated cylinder.

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.