A young man wants to mix orange juice of the right sweetness. He bought juice of concentration 6.0 mol/L in a 50.0 mL package which was filled to capacity. He
empties the entire package of juice into a 2L jug. How much water should he add to
the juice to make a drink of concentration 0.5 mol/L?​

They make up examples of physical properties 

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.

100cm, because 11.0 cm is 3 figures as they've chosen to include the decimal point. if you have a 3 digit number then anything after the second digit will become 0 if it's to 2 significant figures

Answerh2o