What is density? On what factors does density depend on?

Then, think about the structures of Hexane and water molecules. How are they different?

Think of something, and post what you think might be the answer. :)

h bonding in h2o but not in cyclohexane . After that I'm confused
D=M/V NOW WHAT TO THINK

The equation is right.

Density = \frac{Mass}{Volume}

Cyclohexane has a lower density than water means that in the same volume, you have less mass of cyclohexane than you would have in water. Now, why could that be so?

Yes, that could be due to hydrogen bonding... but why then? Hydrogen bonding would hold the water molecules tighter, meaning that in a given volume, you will have a lot more water molecules having a greater total mass.

In that same volume but of cyclohexane, which are less tightly held together, you get only a few molecules with a lower total mass than water.

Also when you consider the 3-dimentional shape of cyclohexane, it is difficult to imagine how those 'protruding' hydrogen atoms above and below the ring can allow for close packing.

300000000000000000000000000000000000
Times thanku thanku thanku .

You're welcome :)