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.
Answer:
40% of registered voters voted
Explanation:
3200 out of 8000,
or :
3200 / 8000
= 0.4
0.4 x 100 = 40
40% of registered voters voted
The molar concentration of a solution, usually expressed as the number of moles of solute per liter of solution.
Bacteria is single-celled microorganisms. Bacteria have different shapes and can cause diseases.
Answer:
The rock cycle
Explanation:
The three types of rocks are related and connected through the rock cycle. Rocks are not formed independently of one another, the process of their formation are interconnected.
Igneous rocks are made from cooling and solidification of magma. These magma are derived from the melting of rocks that have been subjected to high temperature and pressure.
When igneous rocks are formed, they can follow two path ways. They either get transformed to sedimentary rocks or metamorphic rocks.
When igneous rocks are subjected to metamorphic conditions, their mineralogy is altered to form metamorphic rocks.
If igneous rocks gets weathered and broken down by agents of denudation, they end up getting transformed into sedimentary rocks.
