a gaseous mixture of H2 an O2 at 60C and total pressure of 2.5atm contains 75moles %H2.What are the partial pressure s of both gases in the mixture?

1) according to the law of conservation of mass ,in all chemical reactions total mass is unchanged

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Sink to the bottom. addition of potassium nitrate past it’s dissolution capacity at a particular temperature will cause the extra to just sink to the bottom of the glass.however, if you were to raise the temperature of the solution prior to dissolving it, and then slowly decrease the temperature after the dissolution, you would create a “supersaturated” solution - a solution that has more solute dissolved into it than should be allowed. if you add any extra solute past this, the entire solution would “crystallize,” and this is how you get those cool videos on youtube.