If gas comes out of solution when a bottle is opened, then there must have been a greater amount of dissolved gas in the substance while it was under pressure prior to opening the bottle.
you could increase the pressure of the surrounding atmosphere like in a cola bottle
The gas to create bubbles in the cola is carbon dioxide.
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.
what 2 conditions are needed carbonated water (a gas) dissolved in coca -cola
The cause is that Coca-Cola release carbon dioxide gas.
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.
The fizz in Coca-Cola, like all carbonated drinks, comes from dissolved carbon dioxide in the liquid. Upon opening the container, the internal pressure drops, causing the dissolved gas to escape.
Your water bottle may be bubbly due to carbonation or gas dissolved in the water, which creates bubbles when the bottle is opened or shaken.
When a warm bottle of cola is opened and gas spews out, it is a physical change. The release of gas is due to a change in pressure causing the carbon dioxide already present in the liquid to rapidly escape. No new substances are formed in this process.
Cola drinks contain carbonic acid (dissolved carbon dioxide gas) and many also contain phosphoric acid (and/or lactic acid) to balance the sweet taste.
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.