The Illustration provided shows a cross section indicating where underground in a certain area. 100 meters B Impermeable rock Groundwater The groundwater moves upward until it reaches the layer of impermeable rock. Here it is stopped and can't move upward any more. Wells have to be dug to reach the water. At which location will the deepest well need to be dug in order to reach the groundwater? А Location A B Location B C Location C D Location D​

The correct answer is c b c a d

Yes, endothermic means it turns cold. and some chemical changes include change of tempature.

The answers is a nuclear changes

Answerthis solution will not form a precipitateexplanationsolubility equilbrium:         pbf₂(s)  ⇄ pb²⁺(aq) + 2 f⁻(aq)the solubility product expression is    (we exclude solids from the equilibrium expression).now suppose we have the trial ion product q, which we can define as    then, we can interpret  q as the product of the concentration of the ions that we have and ksp as the product of the ion concentrations that are needed to form a saturated solution.if q > ksp, then that implies that there will be a surplus of ions that exceed the amount that is required to form a saturated solution. a precipitate will then form (the precipitate continually  forms until the surplus ions are removed and q is decreased to ksp's value).if q = ksp, the saturated solution that forms is barely saturated and the precipitate will be minimal.if q < ksp, then the ion concentration will not be enough to form a saturated solution (so no precipitate).using our information, we calculate the trial ion product:     since q = 2.7  × 10⁻⁸ < ksp =  4  ×  10⁻⁸, a precipitate will not form.