A bottle of fizzy cola is heavier.
Weight is related to mass. Whenever something loses material and doesn't gain any to replace it, it loses mass. The bottle of fizzy cola has everything the bottle of flat cola has, but the bottle of flat cola has lost some carbon dioxide.
Although carbon dioxide is a gas, and doesn't weigh much more than air, the carbon dioxide in cola is compressed and dissolved and is at a higher pressure and density than carbon dioxide at normal atmospheric pressure. Therefore there is a greater mass of it present. However, the difference in weight would still not be great between the fizzy cola and the flat cola, and it would be difficult to detect.
I believe that it does loose its fizzy
All fizzy drinks contain carbon dioxide dissolved in water (some of it forming carbonic acid). When in this dissolved state the CO2 doesn't take up much space. Shaking the bottle will release the CO2 gas .and one it is no longer dissolved it will tend to take up more space.
The carbon dioxide gas in solution (added under pressure) begins to diffuse into the air, and eventually most will escape, leaving the beverage flat (uncarbonated). If you unwisely agitate (shake) the cola before opening, the gas molecules will gain energy and will more quickly diffuse from the open bottle: the cola will explosively gush out of the bottle with it.
it goes flat..
if its flat you can wash your sink with it.
Actually, carbon dioxide is shot into the soda and that what makes it so fizzy. can you explain why that happens?-flub flub
You can make flat drinks fizzy again by adding fresh carbonated water or soda to the drink. Alternatively, you can use a home carbonation system like a soda maker to add bubbles back into the drink. Swirling the drink gently can also help restore some fizz.
A full tire is heavier than a flat tire. When a they are both flat they weigh the same but added air makes the full tire heavier.
A lower pH level indicates that a substance is more acidic. The reason Coca-Cola is more acidic than lemonade is because the carbonic acid, the stuff that makes cola fizzy, is stronger in acidity and greater in quantity in cola than the citric acid in lemonade. Because of this, flat soda is much less acidic.
Fizzy pop weighs more than flat pop because the carbon dioxide gas bubbles in the fizzy pop add to its overall density. When the bubbles escape and the pop goes flat, it loses some of its volume and therefore weighs less.
Unfortunately, once soda has gone flat, you cannot make it fizzy again. The fizziness comes from carbon dioxide gas that escapes over time. However, you can try adding fresh carbonated water or soda water to the flat soda to make it fizzy again.
I think you could if you also explained why it does go flat.