(mathmatically) why does a pool of fresh, distilled water have the same density of the same liquid?
347041
density has to do with the relationship between mass and volume. Water has a density of 1. As long as the mass stays in the same relationship with the volume of water, it has the same density.
131636
In pretty much all substances, when you heat something (assuming no phase change), the material becomes less dense due to the fact that its volume expands and mass stays constant.\n\nSo if you were to heat a pot of water for example from the bottom on a convection stove, the hot water at the bottom would become less dense than the cooler water on top.  The hot water would rise and it is rises, the cooler water sinks down to take its place.
895667
density = Mass/Volume\nDensity of water=1kg/m^3 or (g/cm^3)\ntherefore density of soda here =1\nvolume 2 L= 2 m^3\nso\nMass of the soda =density of soda X Volume of soda= 1X 2= 2 Kg
439952
You can find in "Chemical Engineer's Handbook", from Perry-Chilton, graphics for density of water + NaCl solution vs. %w/w of NaCl. The NaCl concentration is 3.5%
49373
When you put an object in water--or any other fluid that is minimally compressable, like milk or oil or alcohol--the object takes up space.  Especially for fluids that are very runny--like water, in contrast to, say, old crank-case oil--the fluid will fill every nook and cranny available.  Since the water, or other non-compressable fluid, has to move out of the way for the object put in it, the apparent rise in the total volume of water-plus-object is due to the volume of the object.\n\nOf course, if the object FLOATS in water, you're in a whole new situation: the object will displace (move aside) exactly the amount of water that weighs what the object does.  That's a whole different discussion!
170052
No, and I think you meant density, because mass is the amount of matter in something, so you could have two different masses of the same thing.  If you did mean density, the answer is again no, that is why oil floats on water.
963983
There are many ways to do this problem.  The best way to probably handle density, and perhaps mass even, is using Archimedes principle of buoyancy.  You can find a detailed discussion on www.wikipedia.com and search for Archimedes or buoyancy.  The main idea is that "the weight of the displaced fluid is directly proportional to the volume of the displaced fluid".  \n\ngood luck!
722824
water is denser than wood
968095
The density of alcohol (ethyl) is 0.789 g/mL, so it would take up more space (less dense).  Water is 1 g/mL
445860
Well, distilled water has been distilled, and regular water hasn't.  :D
634933
Density and phase 0.626 g/cm3, liquid
864563
In part, specific gravity can be measured with a hydrometer.  You establish a range that the liquid displaces and let it bob until it comes to equalibrium.  This test can be measured at any temperature.  \n\nHowever, mass density is done in a container that is kept at a constant temprature.  The math is easy once the measurments are taken, but there is more time involved in setting up the test and bringing the whole thing to equalibrum
902070
In weight, it's the same. No mass has been added or taken away by heating it or cooling it down, weight doesn't care about tempurature except possibly at phase changes.\n\nIt does however become more dense until about 4 degrees centigrade, so water of a certain volume at 4 degrees centigrade ways more then water of the same volume at 10 degrees centrigrade. This is because the 4 degree centigrade water is more dense so to get the same volume you need to add more mass.
367774
Water is denser than air (or sunlight).
453196
Actually let me explain a bit further.  You have added a know amount of one of the substances.  and you titrate the other against it.  In the presence of your indicator.\n\nNow it doesnt matter how much water you add you still have the same amount of the thing you measured out and so it will take the same amount of titrant to titrate it.\n\nhope that makes sense.
969488
In science, we assume that all gases have identical densities when volume, temperature and pressure are constant.
1177468
I would think because the acid reacts to the impurities in the water which could make it splash up..but i think distilled water has no impurities so it wouldnt do the same thing..but this is just a guess..i am not an authority on the subject by any means