Question

Is water denser than air?
who can answer this with any example?

Answer 1

no water is heavier than air

Answer 2

ok thnk u.

Answer 3

welcome!:)

Answer 4

does an air bubble sink, or float?

Answer 5

@MrNood An air bubble can sink and float depending on the Waves, Water Temp and air Temp.

Hope I helped!
~ Holly

Answer 6

@sheelo73mughal,

Air is less dense because the particles are mainly of lower molecular mass with similar volume, thus having an inherently lower density, and also because air is free to expand (as it is a gas) where water is liquid and so cannot expand or contract to any major degree.

The End!
~Holly

Answer 7

A striking example is that we have oceans. If water were less dense than air then water would rise and air would sink and all humans would probably be living "underwater" :).

Hope this helps.

Answer 8

@holly741852
I believe your assertion is incorrect.

I don't think you will find a combination of conditions where an air bubble will sink.

It is evident that in turbulent water occasionally an air bubble will be carried down by the mass movement of water - but that is not sinking.

At all times, the density of the air is less than the density of the water and it will always be tending to rise or float in the water.

If you can find a table of properties - pressure, temp, gravity etc. which counters that argument then I will be happy to review your workings.

Air bubbles do not sink in water.

My post was not a question - it was an indication to the OP of a way to deduce the correct answer to their question.

Answer 9

@holly741852
Also the comment about molecular mass is incorrect.

Air is a mixture of (primarily ) N2 (molecular mass 28), and O2 (molecular mass 32)
Water has a molecular mass of 18

Water is denser because it is a liquid - the molecules are much closer to each other than in a gas.

You might also look into the phenomenon of 'Hydrogen Bonds' in water - as these begin to explain WHY water is liquid on earth despite its small molecular weight.

Answer 10

It is possible to argue that water in its gaseous state IS less dense then air, but I believe the OP's question would have been more general about the state if that was the intent of the question.

Ice ,liquid water and 'steam' are all the same compound, but 'water' is normally used to refer to the liquid state unless otherwise stated.