All measurements have some degree of uncertainty.
true
false

True. All measurements are to some decree uncertain, as one cannot know for sure that the measured value is that exact value, even if you using a device that gives very precise measurements to the greatest number of significant figures.

Answer;

A gas in a liquid

Explanation;Pressure affects the solubility of gases. According to Henry's law, the solubility of a gas in a liquid is proportional to the partial pressure of the gas above the liquid at a given temperature, Therefore; For the solubility of gases in liquids, as pressure increases, solubility increases. Hence pressure will have a effect on a solution with a gas in liquid.