<u>Answer:</u> The value of
for the equation is 
<u>Explanation:</u>
The given chemical reaction is:

The chemical equation for which the equilibrium constant is to be calculated follows:

As, the equation is the result of the reverse of given reaction. So, the equilibrium constant for the equation will be the inverse of equilibrium constant for the given reaction.
The value of equilibrium constant for the equation is:

We are given:

Putting values in above equation, we get:

Hence, the value of
for the equation is 
All the statements except Option D is true for the chair confirmation of cyclo hexane.
<h3>Describe the Chair confirmation of Cyclohexane ?</h3>
The flexibility of Cyclo hexane allows for formation of a confirmation ,
This confirmation has lowest energy among the confirmations that can be made for Cyclohexane.
The bond angles are near 109.50 degree,
Each carbon atom has one axial and one equatorial hydrogen atom and All hydrogen atoms on adjacent carbon atoms are staggered.
Therefore Option A , B , C are all true statements about the Chair Confirmation of Cyclohexane.
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Answer:
They will attract each other because opposite charges attract
Explanation:
The mass of 5.15 × 10²¹ atoms of chromium is 0.44 g
From Avogadro's hypothesis,
6.02×10²³ atoms = 1 mole of Cr
But:
1 mole of Cr = 52 g
Thus, we can say that:
6.02×10²³ atoms = 52 g of Cr
With the above information, we can obtain the mass of 5.15 × 10²¹ atoms of chromium. This can be obtained as follow:
6.02×10²³ atoms = 52 g of Cr
Therefore,
5.15×10²¹ atoms = (5.15×10²¹ × 52) / 6.02×10²³
5.15×10²¹ atoms = 0.44 g of Cr
Thus, the mass of 5.15 × 10²¹ atoms of chromium is 0.44 g
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