Solution :
Compound Ksp


FeS 


Ksp of
and both compounds dissociate the same way. Hence
is more soluble than 
is less soluble than 
It is not possible to determine CD -
is more or less soluble than
as though they have a different Ksp values their molecular dissociation is also different and they may have a close solubility values.
can be directly compared with PbS, 



100
1-s s 2s
Ksp = ![[A2+][B-]^2 = s \times (2s)^2 = 4s^3](https://tex.z-dn.net/?f=%5BA2%2B%5D%5BB-%5D%5E2%20%3D%20s%20%5Ctimes%20%282s%29%5E2%20%3D%204s%5E3)
Hence they can be directly compared by Ksp values, smaller the Ksp, smaller the solubility.
For Silver Chloride


1 0 0
1 - s s s
Ksp ![$=[A^{x+}][B^{x-}]=s \times s = s^2$](https://tex.z-dn.net/?f=%24%3D%5BA%5E%7Bx%2B%7D%5D%5BB%5E%7Bx-%7D%5D%3Ds%20%5Ctimes%20s%20%3D%20s%5E2%24)
Hence, they can be directly compared by Ksp values, smaller the Ksp, smaller the solubility.
Answer:
Classifying stars according to their spectrum is a very powerful way to begin to understand how they work. As we said last time, the spectral sequence O, B, A, F, G, K, M is a temperature sequence, with the hottest stars being of type O (surface temperatures 30,000-40,000 K), and the coolest stars being of type M (surface temperatures around 3,000 K). Because hot stars are blue, and cool stars are red, the temperature sequence is also a color sequence. It is sometimes helpful, though, to classify objects according to two different properties. Let's say we try to classify stars according to their apparent brightness, also. We could make a plot with color on one axis, and apparent brightness on the other axis, like this:
Explanation:
Answer : The normal boiling point of ethanol will be,
or 
Explanation :
The Clausius- Clapeyron equation is :

where,
= vapor pressure of ethanol at
= 98.5 mmHg
= vapor pressure of ethanol at normal boiling point = 1 atm = 760 mmHg
= temperature of ethanol = 
= normal boiling point of ethanol = ?
= heat of vaporization = 39.3 kJ/mole = 39300 J/mole
R = universal constant = 8.314 J/K.mole
Now put all the given values in the above formula, we get:


Hence, the normal boiling point of ethanol will be,
or 
The period is the end of the sentence!!!
B. a circle graph
circle graphs are the best to show percentages because they’re very easy to look at and get info from