You have 500 ml of a 4.00 m solution of kno3 from a previous experiment, but now you need 250 ml of a 0.500 m concentration of the same solution. how much of the stock solution will you need to make the dilute solution?
9 ml
20.0 ml
23.08 ml
9.09 ml
31 ml
what is the freezing point of a solution of 498ml of water (solute) dissolved in 2.50 l of ethanol (solvent), c2h5oh?
the density of c2h5oh is 0.789g/cm3. (remember that water has a density of 1.0 g/cm3.)
-25.49°c
-142°c
-89.0°c
-73.3°c
-43.3°c
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