Physics, 21.03.2020 03:00 denzel6887
A technician prepared a solution by heating 100 mL of water while adding KCl crystals until no more KCl would dissolve. She put a lid on the solution and set it aside on the lab bench. After several hours, she noticed the solution had become cloudy and some solid particles had settled to the bottom of the flask. Which statement best describes what happened to the solution? (AKS 6a, DOK2)
A.
At increased temperatures the solubility of KCl increased and remained too high after cooling.
B.
Water molecules, trapped with the KCl crystals, were released after heating.
C.
As the solution cooled, evaporation of water increased the KCl concentration beyond its solubility.
D.
At lower temperatures the solubility of the KCl decreased and recrystallization occurred.
Answers: 1
Another question on Physics
Physics, 22.06.2019 05:00
Which is the best predictor of the radioactive nature of an isotope? o the proton-to-electron ratio the neutron-to-proton ratio o the neutron-to-electron ratio the electron-to-proton ratio
Answers: 1
Physics, 22.06.2019 13:00
At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.
Answers: 3
Physics, 22.06.2019 14:30
What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?
Answers: 1
Physics, 22.06.2019 14:40
On a geologic map, if the contacts between sedimentary rock units form a bull’s-eye pattern of concentric circles, with the youngest unit in the center, the underlying structure is a(n)
Answers: 3
You know the right answer?
A technician prepared a solution by heating 100 mL of water while adding KCl crystals until no more...
Questions
Mathematics, 12.08.2020 06:01
