Answer : The value of diffusion coefficient is, 
Explanation :
Formula used :

where,
D = diffusion coefficient = ?
= 
= 
R = gas constant = 8.314 J/mol.K
T = temperature = 
Now put all the given values in the above formula, we get:


Thus, the value of diffusion coefficient is, 
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324.05 degrees K
To get from C to K just add 273.15
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Answer:
A. CuCN
B. Sr(OCl)2
C. HBrO4
D. HI
E. Na2NH4PO4
F. KH2PO4
G. IF7
H. P4S10
I. HgO
J. Hg2I2
K. SeF6
Explanation:
All have different valent cation and anions like mono di and poly valent ions