If you have to write the chemical formula of a simple, binary ionic compound given the name of the compound, you follow a set of three steps. Let's go through them using magnesium chloride as an example. Write the symbols for the cation and the anion: Mg and Cl. Determine the charge on the cation and anion.
Mixtures are combinations of materials that can be separated by in most cases time. For instance, oil and water is a mixture. You can tell this by placing the two chemicals in a container and shaking them. They will mix and look like one substance, however, they will separate into the two liquids after some time is given. Assuming that "pure substance" is a solution, a substance is similar to a mixture, but the materials used in the solution are not separable. Over time the materials in the containing will not separate. I believe this is the answer you are looking for.
<h2>Hello!</h2>
The answer is: cold, rising air.
<h2>
Why?</h2>
The high-pressure areas are at the poles due to the cold rising air. It's known that the cold air is more sense that the warm air because the warm gases molecules are more separated during the gas, is warm, which make it less dense than cold air.
Due to the form of our planet and the location of the poles, the cold air rises while the warm air down around the tropics and rise again to the poles (getting cold while it's getting closer to the poles).
High-pressure at poles is also caused because the solar radiation is higher at the equator than at the poles.
Have a nice day!
Answer:
Specific rotation of cholesterol is -3.15°.
Explanation:
Given that
Path length = 10 cm = 1 dm.
Observed rotation ,α= - 0.441 °
m= 0.14 g
V= 1 ml
The concentration of cholesterol ,c= m/V g/ml
c = 0.14 / 1 = 0.14 g/ml
We know that specific rotation given as
![[\alpha]_D=\dfrac{\alpha}{l.c}](https://tex.z-dn.net/?f=%5B%5Calpha%5D_D%3D%5Cdfrac%7B%5Calpha%7D%7Bl.c%7D)
Now by putting the all values
![[\alpha]_D=\dfrac{-0.441}{1\times 0.14}](https://tex.z-dn.net/?f=%5B%5Calpha%5D_D%3D%5Cdfrac%7B-0.441%7D%7B1%5Ctimes%200.14%7D)
![[\alpha]_D=-3.15](https://tex.z-dn.net/?f=%5B%5Calpha%5D_D%3D-3.15)
°
Specific rotation of cholesterol is -3.15°.
