Explanation:
To calculate that you need to know the value of the Kps (constant of solubility) at 30°C of KBr in water.
<u>When the product of the concentrations of both ions (Br- and K+) equals the Kps, the solution is saturated. </u>
Given the disociation of the salt in water:
The concentration of both ions are equal (1:1 ratio) and the same as the concentration of KBr added.
The Kps:
![Kps=[K^+][Br^-]](https://tex.z-dn.net/?f=Kps%3D%5BK%5E%2B%5D%5BBr%5E-%5D)
![[KBr]=(Kps)^{1/2}](https://tex.z-dn.net/?f=%5BKBr%5D%3D%28Kps%29%5E%7B1%2F2%7D)
[KBr] are <u>moles of the salt per litre of water</u>
Assuming a density of water of 1 g/cm3, 100 g are 0.1 litre
To calculate the mass:
![m=[KBr]*M*0.1 litre](https://tex.z-dn.net/?f=m%3D%5BKBr%5D%2AM%2A0.1%20litre)
where M is the molecular weight of the salt.
The motion of the wind can turn wind turbines
Answer: C
Explanation: Picture attached.
This reaction is exothermic because the system (the aqueoud solution) is transferring heat to its surroundings (the calorimeter) so this eliminates two responses. Since the heat is being transferred to the surroundings, the water that's in the calorimeter in this case, it is causing the water molecules to heat up and thus an increase in the kinetic energy of the water molecules since temperature affects kinetic energy
Answer:
Gas
Explanation:
Because Crude oil can usually be found in the ground as a liquid and in the air is gas can be kerosene.
