1. Din 800 grame soluţie de concentraţie 20% se evaporă 200 grame apă. Ce concentraţie procentuală va avea noua soluţie obţinută?

Percentage concentration after evaporated : 26.7%

From 800 grams of 20% concentration solution evaporate 200 grams

the water. What percentage concentration will the new solution obtained have?

From 800 g solution, mass of solute :

mass of water :

After water evaporated :

mass solution after evaporated :

%concentration :

i think it is true since you can test the answer and can use observations to complete it.

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.